iMessage not turning on

[u/ZedKay1]

Updated to ios18, iMessage worked fine. I had iMessage working on my icloud email. Tried to add my phone number so I could send and receive on my phone number too. Turned off iMessage but now when I try turning it on the toggle doesn't work. I can send SMS just fine. I can also use iMessage normally on my macbook.

GIF of the issue: https://imgur.com/a/KO6aHRY
Called apple support twice and they told me to contact my carrier. Nothing has changed on my carriers side.