Voice over LTE

Voice over Long-Term Evolution (VoLTE) is a standard high-speed wireless communication for mobile phones and data terminals, including Internet of things (IoT) devices and wearables. It is based on the IP Multimedia Subsystem (IMS) network, with specific profiles for control and media planes of voice service on the LTE wireless broadband service defined by GSMA in PRD IR.92.[1] This approach results in the voice service (control and media planes) being delivered as data flows within the LTE data bearer, with no dependency on (or ultimately, requirement for) the circuit-switched voice network to be in the call path. VoLTE has up to three times more voice and data capacity than older 3G UMTS and up to six times more than 2G GSM. It uses less bandwidth because VoLTE's packet headers are smaller than those of unoptimized VoIP/LTE.[2]

iPhone with active VoLTE call

VoLTE calls are usually charged at the same rate as other calls. A claimed advantage is that the signal penetrates buildings better, eliminating indoor "blackspots" without reception.[3]

To be able to make a VoLTE call, the device, its firmware, and the mobile telephone provider must all support the service in the area, and be able to work together. For example, the Three UK network as of 2019 supports VoLTE (which it brands "Super Voice") on phones supplied by Three (and a few others),[4] and other networks do not support it on "Pay-as-you-Go" (PAYG) phones.

History

In August 2012, MetroPCS launched the world's first commercial VoLTE services in Dallas, Texas, in the United States, alongside the first VoLTE phone, the LG Connect 4G.[5]

In May 2014, Singtel introduced the world's first commercial "full-featured" VoLTE service in Singapore, only in combination with Galaxy Note 3, it was subsequently expanded.[6]

In June 2014, KT showcased the world's first cross-border roaming services based on Voice over LTE. The South Korean operator partnered with China Mobile to develop VoLTE roaming services.[7]

In October 2014, operators based on IMS local breakout architecture with home routing systems.[8]

In November 2014, Verizon and AT&T announced the companies are enabling VoLTE-to-VoLTE connections between their respective customers. VoLTE interoperability between Verizon and AT&T customers began in 2015. Testing and design were performed between both companies using third party networks such as Alcatel-Lucent.[9] This was stated to have been completed in November 2017.[10]

On 11 July 2015, SEATEL Cambodia announced the world's first commercial 100% VoLTE service without 2G/3G in Cambodia.[11][12][13][14][15]

On 14 September 2015, Orange Romania launched the VoLTE service for Samsung users in Romania. [16]

On 16 September 2015, Telstra announced that it had started enabling VoLTE across its network, including calling to National Broadband Network and business and enterprise services with HD handsets.[17]

On 30 November 2015, Telenor Denmark launched VoLTE for all Samsung Galaxy S6 phones, which has since been followed by additional Samsung and Apple models.

In 2016, Vodafone Netherlands launched VoLTE support, along with Wi-Fi Calling.[18]

On 30 June 2016, YTL's YES launches 4G LTE service to become Malaysia's FIRST VoLTE service provider.

In June 2016 Movistar Peru[19] launched commercial VoLTE service in Peru, starting in Lima and Callao for Samsung Galaxy S6, S6 Edge and LG G4 phones. Service will be enabled progressively in other departments and handsets. Movistar Peru is the first operator in the country offering this service.

In July 2016, Etisalat became the first operator to launch VoLTE in UAE.

In July 2016, PT Smartfren Telecom launches VoLTE services working in partnership with Mitel, and become Indonesia's first VoLTE service provider.[20]

On 1 September 2016, Dialog Axiata launched commercial VoLTE service in Sri Lanka.[21]

On 5 September 2016, India's first 4G-only network Jio launched their commercial VoLTE service without 2G/3G based services.[22]

In October 2016, Orange Polska launched commercial VoLTE service in Poland, followed by T-Mobile Polska the following month.

On 7 December 2016, Telenor Denmark launched VoLTE for all phones with VoLTE support.

On 8 March 2017, Cosmote[23] is the first operator that launched VoLTE (and VoWiFi) service in Greece.

On 24 April 2017, TIM launched VoLTE for all phones with VoLTE support in Italy.

In June 2017, Pakistan's Largest telecom operator Jazz has tested VoLTE over its network. Jazz plans to commercially launch it in July 2017.

In June 2017, Bahrain's Largest telecom operator Batelco has semi-launched the service to iOS users.

In July 2017, Digi.Mobil (RCS & RDS) will be the second carrier that launches commercial VoLTE services in Romania.

In July 2017, TIM Brasil was the first carrier to sell VoLTE on Brazil.[24]

In August 2017, Proximus was the first to activate VoLTE in Belgium. Customers were notified by SMS that the service was available.

In September 2017, Swazi Mobile was the first to activate VoLTE in Swaziland.

After this Bharti Airtel also launched the commercial VoLTE service in India.

In October 2017, Nova was the first to activate VoLTE in Iceland.

In November 2017, Telia Company was the first to activate VoLTE in Lithuania.

In November 2017 Entel Peru enabled VoLTE service in Peru, starting in Lima and Callao for Apple iPhone SE, Apple iPhone 6, Apple iPhone 6 Plus, Apple iPhone 6S, Apple iPhone 6S Plus, Apple iPhone 7, Apple iPhone 7 Plus, Apple iPhone 8, Apple iPhone 8 Plus, Apple iPhone X, Huawei Mate 9, Huawei Mate 10 Lite, Huawei P9, LG G4, Motorola MOTO C 4G, Motorola MOTO E4 Plus, Motorola MOTO G5S Plus, Samsung Galaxy J7, Samsung Galaxy S8, Samsung Galaxy S8+, Sony XPERIA L1 and Sony XPERIA XA1 Ultra phones.

In December 2017, Jamii Telecom Limited (JTL), offering broadband data services under the 'Faiba' brand, Jamii Telecommunication Ltd - Home was the first to activate VoLTE in Kenya.

In February 2018, Vodafone India's VoLTE, went live in the Delhi NCR circle, Gujarat and Mumbai[25]

In March 2018, SS7ware, the company behind Yate, launched VoLTE Lab, intended for use as a VoLTE test bed and learning environment.[26]

In May 2018, Play launched commercial VoLTE service in Poland for supported iOS devices.

In June 2018, Orange and Telenet announced that VoLTE will be launched in Belgium.

In January 2019, Mobitel (Sri Lanka) launched VoLTE.

In February 2019, WOM announced that VoLTE along with WiFi Calling will be launched in Chile. Currently working on select Android devices (Samsung s8 and above, in addition to other Huawei models)

In August 2019, SMART Communications has launched the VoLTE service in Metro Manila, Philippines to provide high-definition voice call quality.[27] With Samsung devices to support this feature[28]

In August 2019, Tigo Colombia enabled VoLTE in the country, available for users with the following devices: Huawei Mate 20 Pro, P20, P20 PRO, P30, P30 PRO, P30 Lite, Samsung S9 - S9+ and iPhone from SE and forward. And also Sony Xperia 1.

U.S.-based Tracfone plans to require VoLTE devices by summer of 2020.[29]

As of 2020, almost all new phones for sale support VoLTE.[30]

Deployment
Main article: List of LTE networks

As of February 2019 there were 253 operators investing in VoLTE in 113 countries globally, including 184 operators with commercially launched VoLTE-HD voice service in 87 countries, up from 137 operators in 65 countries 12 months previously, according to data from the Global Mobile Suppliers Association.[31] By August 2019, these numbers had risen to 262 operators investing in VoLTE in 120 countries and 194 operators with launched VoLTE-HD voice services in 91 countries.[32]

A list of commercial VoLTE deployments around the world can be found in the main article above.

Devices
Main article: List of smartphones with HD Voice support

This is an incomplete list.

Mobile devices with support for VoLTE
Brand Name Note
Alcatel LINKZONE [33]
ONETOUCH Fierce XL [34]
Apple iPhone 6 and 6 Plus [35]
iPhone 6S and 6S Plus [36]
iPhone SE (1st generation) [37]
iPhone 7 and 7 Plus [38]
iPhone 8 and 8 Plus [39]
iPhone X [40]
iPhone XR [41]
iPhone XS and XS Max [42]
iPhone 11 [43]
iPhone 11 Pro and Pro Max [44]
iPhone SE (2nd generation) [45]
Andromax E2 [46]
R2 [47]
Asus Zenfone 3 [48] ZE520KL, ZE552KL
BlackBerry Priv [49]
DTEK50 [50]
DTEK60 [50]
KEYone [50]
Motion [citation needed]
KEY2 [citation needed]
KEY2LE [citation needed]
Coolpad Catalyst [51]
Fujitsu Arrows NX [52] F-02G, F-05F, F-04G
Essential Essential Phone
Google Nexus 6P [53]
Pixel and Pixel XL
Pixel 2 and Pixel 2 XL
Pixel 3 and Pixel 3 XL
Pixel 3a and Pixel 3a XL [54]
HTC 10 [55]
Desire 524 [56]
Desire 526 [56]
Desire 530 [57]
Desire EYE [58]
J butterfly [55] HTV31
One A9 [59]
One (M8) [60]
One M9 [61]
Huawei Ascend D2 LTE [62]
Ascend P7 [63]
P8 [59]
P8 Lite 2017
P9 [59]
P9 Lite [59]
Huawei GR 5 2017 [59]
P10 [64]
Kyocera BASIO [55]
DIGNO rafre KYV36 [55]
GRATINA 4G KYF31 [55]
INFOBAR A03 [55] sold under iida brand by "au"
TORQUE G02 [55]
URBANO V01 [55]
URBANO V02 [55]
LG Aristo [65]
Class [48]
Disney Mobile on docomo [52] DM-01G, DM-02H
F60 [48]
G Flex [66]
G Flex 2 [48]
G Pro [62] F240S
G2 [67]
G3 [68]
G4 [56]
G5 [69]
G6 [70]
G7 ThinQ [71]
isai vivid [55] LGV32
isai VL [72] LGV31
K10 [73]
K20 [74]
Lancet [56]
Optimus GX [62] F310L
Optimus LTE 2 [62] F160LV
Optimus LTE III [62] F260S
Optimus Vu II [62] F200L
Spirit LTE Indian Version
Stylo 2 PLUS [75]
Stylus 2 Plus [48]
V10 [48]
V20 [76]
Vu 3 [62] F300
X Screen [48]
Lenovo K5 Note
K6 Power
K6 Note
Z2 Plus
K8
K8 Plus
K8 Note
P2
LYF LYF Earth 1 [77]
LYF Flame 1 [78]
LYF Water 1 [79]
LYF Water 2 [80]
LYF Wind 4S [81]
LYF Wind 6 [82]
Microsoft Lumia 550 [83]
Lumia 640 [83]
Lumia 640 XL [83]
Lumia 650 [83]
Lumia 950 [83]
Lumia 950XL [83]
Motorola Droid Maxx [56]
Droid Maxx 2 [56]
Droid Mini [56]
Droid Turbo [84] XT-1254
Droid Turbo 2 [56]
Moto G (3rd Gen) - XT1550
Moto E3 Power XT1706
Moto G4 Play and Plus XT1643, XT1642, and XT1602
Moto G5 Plus XT1686
Moto Z2 Force [85]
Nokia Nokia 2 [86]
Nokia 3 [87]
Nokia 5 [88]
Nokia 6 [89]
Nokia 6.1 [90]
Nokia 7 [91]
Nokia 7 Plus [92]
Nokia 8 [93]
Nokia 8 Sirocco [94]
OnePlus OnePlus 2 [95]
OnePlus 3/3T [96]
OnePlus 5/5T
OnePlus 6/6T [97]
OnePlus 7
Pantech Vega Iron [62] IM-A870S
Vega N°6 [62] IM-A860S
Vega R3 [62] IM-A850L
Vega Secret Note [62] IM-A890S
Samsung Samsung A01
Galaxy A3 [59][64] 2016 and 2017 model
Galaxy A5 [59][64] 2015, 2016 and 2017 model
Galaxy A7 [48] 2017 model
Galaxy A8 [55] SCV 32
Galaxy A9 Pro [48]
Samsung A10e
Samsung A20
Samsung A50
Samsung A51
Samsung Galaxy A71
Galaxy Active Neo [52] SC-01H
Galaxy Avant [98]
Galaxy Core Prime [56]
Samsung Galaxy Fold
Galaxy Golden [62] SHV-E400
Galaxy Grand [62] SHV-E270
Galaxy J5 [99] SM-J500M, SM-J500FN, SM-J500F
Galaxy J7 [100] SM-J500M, SM-J700FN, SM-J700T, SM-J700P, SM-J700F
Galaxy Light [66]
Galaxy Note II LTE [62] SHV-E250S
Galaxy Note 3 [101]
Galaxy Note 4 [102]
Galaxy Note 5 [103]
Galaxy Note 7 [48]
Samsung Galaxy Note 8 [64]
Samsung Galaxy Note 9
Samsung Galaxy Note 10
Samsung Galaxy Note 10+
Samsung Galaxy Note 10+ 5G
Galaxy Galaxy Note Edge [52] SC-01G
Galaxy Pop [62] SHV-E220S
Galaxy Round [62] SM-G910S
Samsung Galaxy Z Flip
Galaxy S III LTE [62] SHV-E210
Galaxy S4 [62] SCH-R970C
Galaxy S4 mini LTE [104] GT-i9195
Galaxy S4 Zoom [62] SM-C105S
Galaxy S5 [66]
Galaxy S5 Active [52] SC-02G
Galaxy S5 Neo [59] 2016 model
Galaxy S6 [105]
Galaxy S6 Edge [105]
Galaxy S6 Edge+ [106]
Galaxy S7 [107]
Galaxy S7 Active [108]
Galaxy S7 Edge [109]
Galaxy S8 [64]
Galaxy S8+ [64]
Galaxy 8 Active
Galaxy S9
Galaxy S9+
Galaxy S10
Galaxy S10+
Galaxy S10 Lite
Galaxy S10e
Galaxy S10 5G
Galaxy S20 5G
Galaxy S20+ 5G
Galaxy S20 Ultra 5G
Galaxy Win [62] SHV-E500S
Galaxy XCover 4 [64]
Gear S3 [48]
Sharp AQUOS CRYSTAL [53]
AQUOS CRYSTAL 2 [53]
AQUOS CRYSTAL X [53]
AQUOS EVER [52] SH-04G
AQUOS K [55] SHF32, SHF33
AQUOS PAD [52] SH-06F, SH-05G
AQUOS SERIE [55] SHV32, SHV33
AQUOS SERIE mini [55] SHV31, SHV33, SHV38
AQUOS Xx [53]
AQUOS ZETA [52] SH-01G, SH-04F, SH-03G
Disney Mobile on docomo [52] SH-02G
Sony Xperia A4 [52] SO-04G
Xperia M4 Aqua Dual [52] SO-06F
Xperia SP M35t [62]
Xperia X [64]
Xperia X Compact [64]
Xperia X Performance [55] SHV32
Xperia XZ [53]
Xperia XZs [64]
Xperia Z2 [52] SO-03F
Xperia Z2 Tablet [52] SO-05F
Xperia Z3 [52] SO-01G, D6653
Xperia Z3 Compact [52] SO-02G
Xperia Z4 [110] SO-03G
Xperia Z4 Tablet [52] SO-05G
Xperia Z5 [59]
Xperia Z5 Compact [59]
Xperia Z5 Premium [111]
vivo V3 [112]
Vodafone Smart speed 6 [59]
Smart Ultra 6 [59]
Smart Platinum 7 VFD900
Vodafone Smart E8 VFD510
Vodafone Smart Prime 7 VFD600
Vodafone Smart V8 VDF710
Xiaomi Mi5 [113]
Redmi Note 4 [114]
Redmi Note 3
Redmi 3s [115]
Redmi 3s Prime [116]
Mi A3
Mi Max [117]
Mi Mix 2 [117]
Mi 4A [117]
Mi 5A [117]
Mi 9T and 9T Pro (sold as Redmi K20 and K20 Pro in China and India) [117]
Redmi Note 5 [117]

Voice quality

To ensure compatibility, 3GPP demand at least AMR-NB codec (narrow band), but the recommended speech codec for VoLTE is Adaptive Multi-Rate Wideband (AMR-WB), also known as HD Voice. This codec is mandated in 3GPP networks that support 16 kHz sampling.[118] Volte Fraunhofer IIS has proposed and demonstrated "Full-HD Voice", an implementation of the AAC-ELD (Advanced Audio Coding – Enhanced Low Delay) codec for LTE handsets. Where previous cell phone voice codecs only supported frequencies up to 3.5 kHz and upcoming wideband audio services branded as HD Voice up to 7 kHz, Full-HD Voice supports the entire bandwidth range from 20 Hz to 20 kHz. For end-to-end Full-HD Voice calls to succeed however, both the caller and recipient's handsets as well as networks have to support the feature.[119]

The GSMA has nominated the EVS codec for superwideband via VoLTE.[120]

gollark: This can be the two boxer server. We can have another for the superior one boxers.
gollark: Esolangs fractures into two divided by different opinions on game theory WHEN?
gollark: It works if they're *identical* and know they'll both make the same decision.
gollark: Taking one box is also rational because if you do you get 1 million and if you don't you get 10000.
gollark: Predicting which box I'll take effectively means running a high accuracy simulation of me. Thus, since I may be being simulated when I choose, my choice does affect the (eventual) box content, thus take one box.

See also

References
  1. Nick Russell (3 March 2013). "Official Document IR.92 – IMS Profile for Voice and SMS" (PDF). GSMA. Retrieved 14 September 2014.
  2. Elkin, Ed (10 April 2014). "The Secret Value of VoLTE". TMCnet. Retrieved 14 September 2014.
  3. "Kick indoor blackspots' ass with 4G Super-Voice". Three Network. Retrieved 17 December 2019.
  4. "4G Super Voice Phones - Browse supported mobile phones". Three network. Retrieved 14 December 2019.
  5. "MetroPCS lights up Voice over LTE (VoLTE) services, starts selling LG Connect 4G". Engadget. Retrieved 2018-08-08.
  6. "SingTel, Samsung and Ericsson unveil world's first full-featured Voice over LTE service". SingTel. 19 May 2014. Retrieved 4 August 2014.
  7. "KT and China Mobile claim world first for cross-border VoLTE roaming". TeleGeography. 13 June 2014. Retrieved 14 September 2014.
  8. "China, KPN, iBasis implement first VoLTE roaming calls". Telecompaper. 2014-10-14. Retrieved 2014-10-14.
  9. "Verizon, AT&T partner to enable VoLTE interoperability". 3 November 2014. Retrieved 4 November 2014.
  10. Segan, Sasha. "Verizon Is Heading Toward a Gigabit, CDMA-Free Future". PCMag. PCMag. Retrieved 14 November 2017.
  11. "Seatel Cambodia to invest $400m into 4G". telecomasia.net. 2015-02-11. Retrieved 2015-02-11.
  12. "GT-Tell buyer SEATEL investing in 4G rollout". TeleGeography. 2015-02-10. Retrieved 2015-02-10.
  13. "Seatel, ZTE to deploy FDD-LTE network in Cambodia". RCR WIRELESS. 2015-06-23. Retrieved 2015-06-26.
  14. "中兴通讯携手东南亚电信共建LTE 4G网络". CCTIME. 2015-06-18. Retrieved 2015-06-20.
  15. "100% 4G VoLTE". Seatel. 25 Jun 2015. Retrieved 25 Jun 2015.
  16. "Orange lansează luni un nou serviciu: Apelurile 4G prin tehnologia VoLTE | Ziarul Financiar". ZF.ro.
  17. Mike Wright, Group Managing Director of Networks in Telstra Operations (16 September 2015). "The Next Generation of Voice Calling Starts Today – Telstra VoLTE" (Press release). Telstra. Retrieved 16 September 2015.
  18. "Ericsson and Vodafone deploy first cloud-based VoLTE and Wi-Fi calling in the Netherlands – Ericsson" (Press release). Ericsson. 11 March 2016. Retrieved 24 February 2017.
  20. TeleGeography. "Smartfren and Mitel launch Indonesia's first VoLTE service with SPIRIT DSP". telegeography.com. Retrieved 2017-05-29.
  21. "Sri Lanka's first VoLTE network on Dialog 4G". The Island. 2016-09-01. Retrieved 2016-09-01.
  22. "Jio opens Mobile Number Portability, urges incumbent telcos to fulfil regulatory obligations". India Today. 2016-09-03. Retrieved 2016-09-03.
  24. "VoLTE: TIM começa a liberar chamadas por 4G - Tecnoblog". Tecnoblog. 2017-07-24. Retrieved 2017-07-25.
  25. "Vodafone VoLTE service live in four cities: List of compatible devices, how to activate". February 9, 2018.
  26. "VoLTE complete test suite, includes IMS Core, LTE radio and 2 iPhone 6s". YateBTS. May 8, 2018.
  27. "Smart launches VoLTE in Metro Manila". smart.com.ph. Retrieved 2019-09-06.
  28. "Samsung handsets to support Smart's VoLTE, VoWifi". smart.com.ph. Retrieved 2019-09-06.
  29. "Update Regarding Network Changes | TracFone". extras.tracfone.com. Retrieved 2020-01-29.
  30. Yash Tripathi. "What Is VoLTE?". 2020.
  31. GSA: VoLTE and ViLTE: Global Market Update (February 2019) https://gsacom.com/paper/gsa-announces-253-operators-investing-volte/
  32. GSA: VoLTE & ViLTE: Global Market Update, August 2019
  33. "Tech specs: Alcatel LINKZONE". T-Mobile. Retrieved 25 March 2017.
  34. "Tech specs: Alcatel ONETOUCH Fierce XL". T-Mobile. Retrieved 25 March 2017.
  35. "iPhone 6 - Technical Specifications". Apple. 11 September 2014. Retrieved 11 September 2014.
  36. "iPhone 6s - Technical Specifications". Apple. 9 September 2015. Retrieved 9 September 2015.
  37. "iPhone SE - Technical Specifications". Apple. 22 March 2016. Retrieved 2 April 2016.
  38. "iPhone 7 - Technical Specifications". Apple. 7 September 2016. Retrieved 7 September 2016.
  39. "iPhone 8 - Technical Specifications". Apple. 12 September 2017. Retrieved 9 November 2017.
  40. "iPhone X - Technical Specifications". Apple. 12 September 2017. Retrieved 9 November 2017.
  41. "iPhone XR - Technical Specifications". Apple. 12 September 2018. Retrieved 23 September 2018.
  42. "iPhone XS - Technical Specifications". Apple. 12 September 2018. Retrieved 23 September 2018.
  43. "iPhone 11 - Technical Specifications". Apple. 19 September 2019. Retrieved 19 September 2019.
  44. "iPhone 11 Pro - Technical Specifications". Apple. 19 September 2019. Retrieved 19 September 2019.
  45. "iPhone SE - Technical Specifications". Apple. 13 April 2020. Retrieved 13 April 2020.
  46. "Andromax E2 with VoLTE". Smartfren. 19 February 2016. Archived from the original on 21 February 2016. Retrieved 21 February 2016.
  47. "Andromax R2 with VoLTE". Smartfren. 19 February 2016.
  48. "Which handsets are supported? / Is my handset supported?". Singtel. Retrieved 15 April 2017.
  49. "Priv user guide" (PDF). BlackBerry.
  50. "Devices compatible with T-Mobile Extended Range LTE". Spectrum Gateway. Retrieved 26 July 2020.
  51. "Tech specs: Coolpad Catalyst". T-Mobile. Retrieved 25 March 2017.
  52. "VoLTE（ボルテ）" (in Japanese). NTT DoCoMo. Retrieved 2014-09-18.
  53. "［VoLTEオプション］対象機種を教えてください。" (in Japanese). Softbank. Retrieved 11 September 2015.
  54. "Pixel phone hardware tech specs - Pixel Phone Help". Google Support. Retrieved 30 July 2020.
  55. "au VoLTE" (in Japanese). au. Retrieved 25 March 2017.
  56. "Advanced Calling 1.0". Verizon Wireless. Retrieved 6 September 2015.
  57. "Tech specs: HTC Desire 530" (in Japanese). T-Mobile. Retrieved 25 March 2017.
  58. "HTC Desire EYE – White (Coral Reef)". AT&T. Retrieved 9 November 2014.
  59. "Was brauche ich für VoLTE?" (in German). Vodafone. Retrieved 24 March 2017.
  60. "AT&T HTC M8 to get Eye and VoLTE update early next week". GSMArena. 24 January 2015. Retrieved 6 September 2015.
  61. "Jetzt auch mit dem HTC One M9 im LTE-Netz telefonieren" (in German). Vodafone. 7 August 2015. Retrieved 6 September 2015.
  62. "HD voice (W-AMR) mobile phones and suppliers report: 329 phones (incl. VoLTE), 19 suppliers" (PDF). GSA. 21 March 2014. Archived from the original (PDF) on 2017-06-30. Retrieved 15 September 2014.
  63. "Vodafone Romania launches VoLTE technology". Telecompaper. 6 November 2014. Retrieved 6 November 2014.
  64. "Vilka mobltelefoner har VoLTE?" (in Swedish). Telia. 12 April 2017. Retrieved 15 April 2017.
  65. "Tech specs: LG Aristo". T-Mobile. Retrieved 25 March 2017.
  66. Phil Nickinson (18 June 2014). "Samsung Galaxy S5 joins T-Mobile's VOLTE ranks". Android Central. Retrieved 14 September 2014.
  67. Ryan Whitwam (15 September 2014). "Verizon's Advanced Calling 1.0 Rolls Out Today, Enabling VoLTE And Video Calls On Supported Devices". Retrieved 15 September 2014.
  68. "Rogers_launches_Voice_over_LTE". Rogers. 31 March 2015. Retrieved 22 July 2015.
  69. "LG G5 Details". AT&T. Retrieved 25 March 2017.
  70. "Tech specs: LG G6". T-Mobile. Retrieved 25 March 2017.
  71. "Tech specs: LG G7 ThinQ". T-Mobile.
  72. "LG Isai VL debuts in Japan with 3GB of RAM and VoLTE". GSMArena. 27 October 2014. Retrieved 27 October 2014.
  73. "LG K10 Details". AT&T. Retrieved 25 March 2017.
  74. "Tech specs: LG K20". T-Mobile. Retrieved 25 March 2017.
  75. "Tech specs: LG Stylo 2 PLUS". T-Mobile. Retrieved 25 March 2017.
  76. "LG V20 Details". AT&T. Retrieved 25 March 2017.
  77. LYF EARTH 1 Smartphone: Features, Specs & Price of LYF EARTH 1 Mobile Phone Archived 2016-04-10 at the Wayback Machine. LYF. Retrieved 16 September 2016.
  78. LYF FLAME 1 Smartphone: Features, Specifications & Price of LYF FLAME 1 Mobile Phone Archived 2016-04-10 at the Wayback Machine. LYF. Retrieved 16 September 2016.
  79. LYF WATER 1 Smartphone: Features, Specs & Price of LYF WATER 1 Mobile Phone Archived 2016-04-10 at the Wayback Machine. LYF. Retrieved 16 September 2016.
  80. LYF WATER 2 Smartphone: Features, Specs & Price of LYF WATER 2 Mobile Phone Archived 2016-04-10 at the Wayback Machine. LYF. Retrieved 16 September 2016.
  81. LYF WIND 4S Smartphone: Features, Specs & Price of LYF WIND 4S Mobile Phone. LYF. Retrieved 4 February 2018.
  82. LYF WIND 6 Smartphone: Features, Specifications & Price of LYF WIND 6 Mobile Phone Archived 2016-04-10 at the Wayback Machine. LYF. Retrieved 16 September 2016.
  83. "FAQ -Can I use Voice over LTE services with my Lumia?". Microsoft. Archived from the original on 7 April 2016. Retrieved 7 April 2016.
  84. "VoLTE arrives on Droid Turbo in Advanced Calling update". Mobile Nations. 11 December 2014. Retrieved 13 December 2014.
  85. "Motorola Moto Z2 Force with VoLTE Support and ShatterShield Display Announced - TelecomTalk". TelecomTalk.info. Retrieved 2019-08-17.
  86. "Nokia 2 – Live more between charges". Nokia. Retrieved 5 November 2017.
  87. "Nokia 3 – Android phone with all the smartphone essentials". Nokia. Retrieved 14 October 2017.
  88. "Nokia 5 – perfectly balanced Android phone". Nokia. Retrieved 14 October 2017.
  89. "Nokia 6 – Android phone with a metal body". Nokia. Retrieved 14 October 2017.
  90. "Nokia 6 second generation – It's worth it anyway". Nokia. Retrieved 9 January 2018.
  91. "Nokia 7 – Anyway, more beautiful". Nokia. Retrieved 5 November 2017.
  92. "Nokia 7 Plus mobile | Top-rated smartphone". www.nokia.com.
  93. "Nokia 8 - Share both sides of the story". Nokia. Retrieved 14 October 2017.
  94. "Nokia 8 Sirocco". www.nokia.com.
  95. "OnePlus adds VoLTE support to the OnePlus 2 with December security update". AndroidAuthority. 22 December 2016. Retrieved 23 December 2016.
  96. "OnePlus 3 Does Support T-Mobile's VoLTE Network". AH. 14 June 2016. Retrieved 16 August 2016.
  97. "OnePlus 6 FAQ - Dash Charge, Face Unlock, Dual VoLTE, Waterproof, Heating". AndroidBeat. 28 May 2018. Retrieved 12 June 2019.
  98. tmo_johnr (24 June 2014). "Software version and updates: Samsung Galaxy Avant". T-Mobile US. Retrieved 7 November 2014.
  99. "What are the 4G Voice supported devices that M1 carries?" (in Japanese). M1. Retrieved 15 April 2017.
  100. "Tech specs: Samsung Galaxy J7" (in Japanese). T-Mobile. Retrieved 25 March 2017.
  101. "PCCW (HKT) launches VoLTE; 3 HK not far behind". TeleGeography. 16 May 2014. Retrieved 14 September 2014.
  102. Menchie Mendoza (6 April 2015). "Verizon Rolls Out Galaxy Note 4 Android 5.0 Lollipop Update: Samsung TouchWiz, VoLTE Support, And More". Tech Times. Retrieved 6 September 2015.
  103. Matthew Miller (17 August 2015). "Nine reasons to buy the Samsung Galaxy Note 5 instead of the Moto X Pure Edition". ZDNet. Retrieved 6 September 2015.
  104. Chris Welch (22 May 2014). "T-Mobile lights up VoLTE in the US, AT&T to follow tomorrow". The Verge. Retrieved 14 September 2014.
  105. "Ab sofort mit Samsung S6 und S6 edge im Vodafone LTE-Netz telefonieren" (in German). Vodafone. 16 July 2015. Retrieved 6 September 2015.
  106. "LTE-Telefonie mit dem neuen Samsung S6 Edge +" (in German). Vodafone. 14 August 2015. Retrieved 6 September 2015.
  107. "How to enable VoLTE on the GS7". Android Central. Retrieved 28 April 2016.
  108. "S7 Active and T-Mobile: Band 12, VoLTE". XDA Developers. Retrieved 25 March 2017.
  109. "How to enable VoLTE on the GS7". Android Central. Retrieved 28 April 2016.
  110. "Sony Xperia Z4 gets certified by Japanese wireless authority". GSMArena. 16 January 2015. Retrieved 6 September 2015.
  111. "VoLTE und WLAN Call" (in German). Telekom Deutschland GmbH. Retrieved 25 March 2017.
  112. "Vivo V3 with VoLTE capability now at discounted price of Rs 14,980". The Indian Express. 29 July 2016. Retrieved 24 March 2017.
  113. "Xiaomi Mi5 Specs". Mi China. 15 October 2016. Retrieved 15 October 2016.
  114. "Redmi Note 4 Specifications". Lowest Online.
  115. "Redmi 3S overview". Mi.com. Xiaomi. Retrieved 28 March 2020.
  116. "Redmi 3s Prime Specifications". Lowest Online.
  117. "Xiaomi United States - Xiaomi United States". Mi.com.
  118. "LTE delivers superior voice, too" (PDF). Ericsson. 2010. Archived from the original (PDF) on 24 September 2015. Retrieved 14 September 2014.
  119. "Fraunhofer IIS Presents the World's First Full-HD Voice Calls on Android Phones over LTE at Mobile World Congress 2017" (PDF). Fraunhofer IIS. 23 February 2012. Retrieved 23 June 2015.
  120. "EVS". Fraunhofer Institute for Integrated Circuits IIS. Retrieved 2020-05-10.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.