At least one of the rumored three new 2018 iPhones will reportedly use a copper wire coil for wireless charging rather than the FPC coil used by the iPhone X and iPhone 8.
Allen Horng, Chairman and CEO of Catcher Technology, a key Apple supplier, appears to have corroborated reports that Apple will be switching to an all glass design for the iPhone in 2017.
Instructions on how to unlock the iPhone 4, iPhone 3GS, and iPhone 3G for use with any GSM cellphone carrier using UltraSn0w. This will work with the iOS 4.2.1 firmware on the 06.15.00 baseband.