Do you get the “iMessage is Signed Out” pop-up whenever you open a thread in your iPhone’s Messages app? If so, you won’t be able to send or receive blue text bubbles unless you fix it. We’ll walk you through some troubleshooting steps.
Make Sure iMessage Is Enabled
Often, the reason you get the “iMessage is Signed Out” error is pretty simple: you may have accidentally disabled iMessage on your iPhone. To check this, go to Settings > Messages on your iPhone and make sure iMessage is toggled on.
If it’s already enabled: toggle it off, wait a few seconds, and toggle it back on again to force your iPhone to reactivate the service and sign back into iMessage.