<ul><li>iMessage activation error is a pop-up that says 'An error occurred during activation. Try again.'</li><li>If you get an activation error, you'll only be able to send regular SMS messages instead of iMessages.</li><li>To fix iMessage activation errors, first verify that iMessage is on and then restart your iPhone.</li><li>If the previous fixes don't work, check Apple’s server status page and make sure your iPhone has a working internet connection.</li><li>To kick-start the connection again, refresh your iMessage connection from Settings > Messages.</li><li>Another fix is to sign out of your Apple ID and sign back in, which forces iMessage to reconnect when you log in again.</li><li>If the date and time are incorrect on your iPhone, this can affect iMessage activation or make it not work properly.</li><li>Make sure that you have the latest version of iOS to avoid any iMessage activation errors.</li><li>If everything fails, perform a factory reset on your iPhone and contact Apple support or your cellular provider for more assistance.</li></ul>

How to fix iMessage activation errors on your iPhone

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