Deregister Number
Hey , i have an issue with my iMessage (iPhone 7 Plus 128GB) on iOS 11.2
so i want to change my number to my new one , which is i have 11 digits number , i cant input that 11 digits number into apple deregister website , anyway im in Indonesia Country . please help me how to fix this , i really want to change my iMessage number , thanks !
(Sorry Bad English cos not my primary language)
iPhone 7 Plus, iOS 11.2