If you’re getting the imessage signed out error on your iPhone, it means that iMessage is no longer linked to your Apple ID. This can happen when you change your phone number or you accidentally switch off the feature through Settings. The good news is that you can get back into iMessage and use it normally again by following some simple troubleshooting steps.
The first step is to restart your iPhone. Restarting can fix most in-app or connectivity problems and gives your device a fresh start. You can also try to reset your network settings. But before you do that, be sure to save your Wi-Fi network credentials and Bluetooth connections to another device. You can do this by navigating to Settings > General > Reset.
iMessage Signed Out? Troubleshooting Steps to Regain Messaging Access on Your Apple Device
You can also check if your SIM card is inserted properly by taking it out and then reinserting it. If this doesn’t work, it might be time to replace your SIM or eSIM if necessary.
A subpar cellular data connection can trigger the iMessage Signed Out error. Make sure that you have an active mobile data connection and that your carrier or service provider is online by checking the signal bar on your device. Another possible cause of this issue is a software glitch that prevents your phone from connecting to iMessage servers. This can be fixed by installing an iOS update that comes with bug fixes. You can find the latest version of iOS by navigating to Settings > General > Software Update and tapping Install if available.