If your iPhone is dropping calls on T-Mobile, AT&T, Verizon, or US Cellular, you’re not alone. In 2025, many users report call failures due to network changes, iOS updates, VoLTE issues, or simple device glitches. This guide walks you through real fixes that consistently work across all major U.S. carriers.

1. Toggle Airplane Mode (Fast Refresh)

This resets your network connection without rebooting the phone.

Swipe down from the top-right corner.
Tap Airplane Mode → wait 10 seconds → turn it off.

2. Update Carrier Settings

Carriers frequently push updates to improve 5G/VoLTE stability.

Go to Settings → General → About.
If a popup appears, tap Update.

3. Turn VoLTE / 5G On or Off

Some regions and towers have unstable 5G or VoLTE coverage. Switching modes often stops call drops.

Try these combinations:

5G Auto instead of 5G On.
Switch to LTE only.
Toggle VoLTE on/off (varies by carrier).

4. Reset Network Settings

One of the most reliable fixes for U.S. carrier issues.

Go to Settings → General → Transfer or Reset iPhone.
Select Reset → Reset Network Settings.

Your data stays safe, but you’ll need to re-enter Wi-Fi passwords.

5. Reseat or Replace the SIM

Physical SIMs on carriers like US Cellular or Verizon may cause drops if not seated correctly.

Remove the SIM tray.
Clean the SIM gently.
Reinsert firmly.

For eSIM users, reinstalling the plan through your carrier app can fix provisioning issues.

6. Disable Wi-Fi Calling (or Enable It)

Depending on the carrier and tower congestion, Wi-Fi Calling can either help or cause drops.

Go to Settings → Phone → Wi-Fi Calling.
Toggle it on or off and test.

7. Check for iOS Updates

Apple frequently fixes modem and call stability bugs in incremental patches.

Go to Settings → General → Software Update.

8. Turn Off Call Forwarding

Accidental forwarding settings can cause calls to disconnect or never connect properly.

Open Settings → Phone → Call Forwarding.
Turn it off.

9. Reset All Settings (Last Resort)

If nothing else works, this resets system settings without deleting photos or apps.

Go to Settings → General → Reset.
Choose Reset All Settings.

10. Contact Your Carrier

If your area is experiencing tower maintenance, outages, or 5G refarming, only the carrier can confirm it. Ask them to check:

VoLTE provisioning
IMSI/ICC profile issues
Local tower congestion or outages

Final Notes

Most U.S. users report success after resetting network settings, toggling 5G/LTE, or updating carrier settings. If your iPhone still drops calls after these steps, you may be dealing with a carrier-side provisioning issue, not a device problem.

iPhone Keeps Dropping Calls? Fix It on Any U.S. Carrier (2025)