Chosen Solution

I have an iPhone 6s Plus- Month ago I lose service, said No Service- i thought cell tower went down. Went to my carrier T-Mobile, they swapped out SIM cards and phone worked. 4 miles away driving home the same thing, took it back to them, they swapped sim cards again, this time nothing. They said take it to Apple. I ordered a new antenna, sim card tray from ifixit.com along with new battery (figured while in the unit minus well replace battery). Installed everything, and still have same problem. Can anyone assist?? Thank you

Try this:

  1. Go to Settings
  2. Select General
  3. Select Reset
  4. ONLY choose “Reset Network Settings” Try it once it restarts.