IPhone 13 stuck in SOS mode

1.

Go to setting - Emegency SOS -> turn Off the options.

2.

If it doesn't help, remove and reinsert the SIM card.

If it doesn't help contact your carrier, maybe the SIM card is damaged, ask for a replaced (new) card. Normally it is free.

Also  ask to check if the SIM tray is bent, as even a tiny misalignment can cause the SIM card to not fully connect with the internal contacts in your iPhone.

3.

If it doesn't help see these Apple articles below:

If you see No Service, Searching, or SOS on your iPhone or iPad

If you see No Service, Searching, or SOS on your iPhone or iPad - Apple Support

Manually update your carrier settings on your iPhone or iPad

Manually update your carrier settings on your iPhone or iPad - Apple Support

Update your network provider settings manually on your iPhone or iPad

Update your network provider settings manually on your iPhone or iPad – Apple Support (UK)

My alarm went off this am and it showed on my screen like a starburst and I couldn't turn it off. I finally got it off now my phone screen is black and frozen. When I try to reboot it goes into SOS mode.