I have an iPhone 7 using a prepaid sim and service through att. I’m originally from Colorado and took a road trip to Florida. My service was fine on the road but once I got to Haines City, FL issues started. My texts won’t send, my phone goes in and out of no service, and my calls are dropping. I already reset my network settings.
Let's take a look at this. The towers in the area do not appear to be undergoing maintenance. Try a soft reset. Press and quickly release the Volume Up button. Then press and quickly release the Volume Down button. After, press and hold the Sleep/Wake button until you see the Apple logo. This should assist the device in attempting to make a connection with a closer, stronger signal if one is available. Let us know if this helps.