however, Spectrum supposedly piggy-backs on Verizon's network so I wouldn't think that would be an issue and neither did Tech Support. Plus, I transferred from Verizon as well - although I changed my carrier AND my phone; he did not change phones.) The last resort suggested by Apple is...
To close the Phone app,double-pressthe Home button. If your iPhone doesn’t have a Home button,swipe up from the bottom of the screen to the center of the screen. This opens App Switcher, which displays all the apps currently running on your iPhone. Use your finger to swipe up on the...