I'd like to ask a question. Does filling phone memory with junk data actually overwrite all previous data. Just in case I would like to say that I'm asking for android and iphone memory. And is eeprom used in these phone or flash memory?
ps i also would like to ask one more thing. in iphone(above 3gs) when you factory reset the data in encrypted and the keys are deleted. so is the data in the worn out area also encrypted