Question: what is the difference of iphone gpp and factory unlocked?
Answer: GPP unlocked is unlocking option that uses "GPP" chip to read any SIM. (Ex. for Smart Locked iPhone, you can use GPPLTE chip so you can openline the phone and use it for other network sim like Globe, TM, etc.) ... Almost Factory Unlocked, just do not "Erase All Contents and Settings" or “Restore” on your iPhone.