While stumbling upon different articles, I came across this video on YouTube of a guy in Shenzhen, China, that can replace the internal 16GB storage with a 128GB capacity NAND, so it's highly possible that a modified version of this is what's been done to the iPhone..
https://www.youtube.com/watch?time_continue=198&v=2bGb5AOwp4...
superuser2|10 years ago
yq|10 years ago