How do you carrier unlock a iPhone 7 for free?
My grandmother recently passed on, and my mother said she I could have her iPhone. When I put the sim card from my Verizon iPhone 6s into her AT&T iPhone 7 it said the sim card could not be activated. When I called AT&T, they said they couldn't because she didn't pay her phone bill (She was in the hospital for about 8 months and left her phone in her house). So, is there anyway I can do it myself for free?