If you see or in the status bar or a message that the SIM is not recognized:

1. Turn your phone off and then on again.

   Press the Power + Volume up buttons simultaneously, then touch Restart to establish a new connection with the network.

2. Do one of the following:

   • If you're using a physical SIM card, turn your phone off, then remove and reinsert the SIM.
   • If you're using an eSIM, reset the eSIM and then set it up again.
3. Contact your carrier to make sure your account is set up properly.
4. Ask your carrier to replace the SIM card.
5. Perform an external phone reset.

If you're having network issues:

1. If you usually have a signal but the status bar shows in your current location, move to another area where you can receive a signal, like outdoors. If you’re uncertain whether your carrier provides service in that location, check the coverage map on your carrier’s website.
2. If airplane mode is on, turn it off.
3. Turn your phone off and then on again.
4. Check for app updates.
5. Check if a software update is available for your phone.
6. Remove your SIM card and reinsert.
7. Use safe mode to see if apps you installed are causing the issue and uninstall as needed.
8. Reset the phone.

1. Turn your phone off and then on again.

   Press & hold the Power + Volume up buttons simultaneously, then touch Restart to establish a new connection with the network.

2. Clear the cache for the Phone app.
3. Use safe mode to see if apps you installed are causing the issue and uninstall as needed.
4. Check if a software update is available for your phone.
5. Reset the phone.

Outbound calls

1. If you hear a fast busy signal when you call a number, all cellular circuits may be in use, preventing the call from going through. Try calling again later.
2. If you hear a fast busy signal every time you call the same number, your number may be blocked by an app. Try calling from a different number.

Incoming calls

If you have a signal and can make calls, but callers tell you they consistently get a busy signal when calling you, check that you haven’t blocked their numbers.