i have had very spotty to no service since upgrading to 9.3.4 on my 6+. i went to att and got a new SIM card but same problem exists! First problem ever with Apple iPhone!!! Not happy!!!!
iPhone 6 Plus, iOS 9.3.4
Posted on Aug 17, 2016 9:54 PM
Q: No service since upgrade 6+
If you can't connect to a cellular network or cellular data - Apple Support