Editing Openai/689d5536-2710-8008-9dd0-96de4530ae04 (section)

=== Assistant: That’s actually a big clue — if SMS is working now but voice calls fail instantly, your iPhone is still having trouble … ===
That’s actually a big clue — if SMS is working now but voice calls fail instantly, your iPhone is still having trouble attaching to AT&T’s voice service, even though it’s connected enough for text.

Here’s what that usually means:

==== - SMS to Android travels over the traditional carrier voice/SMS network (2G/3G/VoLTE). ====
* iMessages use data only — so they’ll work as long as your LTE/5G data works.
* The fact that SMS now works suggests the SIM’s connection to AT&T is at least partially healthy.
* Instant call failure (no ringing, no delay) means the phone is failing the initial “voice attach” handshake — often a VoLTE setting or provisioning problem on the carrier’s side.

==== 1. Toggle Airplane Mode - Turn Airplane Mode on for 30 seconds, then off. - This forces a fresh registration with the network. ====
# Check Voice & Data settings - Go to Settings → Cellular → Cellular Data Options → Voice & Data. - If it’s on 5G, try switching to LTE (or vice versa) and retry a call. - Make sure “VoLTE” or “LTE for Calls” is enabled.
# Turn Wi-Fi Calling On/Off - Settings → Cellular → Wi-Fi Calling — toggle it on, wait a bit, then try a call. - If already on, try turning it off to force calls over the tower instead of Wi-Fi.
# Reset Network Settings - Settings → General → Transfer or Reset iPhone → Reset → Reset Network Settings. - You’ll have to re-enter Wi-Fi passwords afterward.
# Test Another SIM or Device - Put your SIM in another phone. - If calls work there, the iPhone’s the problem. - If calls still fail instantly, AT&T needs to reprovision your line.

==== - A SIM can register for SMS/data but fail voice if the network thinks your device isn’t VoLTE-capable (or if your VoLTE flag got dropped on your account). ====
* AT&T stopped allowing non-VoLTE calls entirely after the 3G shutdown, so if VoLTE provisioning is wrong, all calls fail instantly.
* AT&T tech support can “refresh” or “re-provision” your line in under 5 minutes — you just need to ask for a VoLTE provisioning check.

If you want, I can give you the exact wording to tell AT&T support so you don’t waste an hour with basic scripts. That’ll get you directly to the “provisioning refresh” you probably need.

Do you want me to write that out?