SOS is in upper right corner. Why and how to fix?

If you already tried (to no avail) the steps provided at points A) & B) below:

A) Try a "forced" restart of your device using these instructions: Put it on charge for at least half an hour, then, keeping it plugged in, use these gestures:

Press and quickly release the volume up button, press and quickly release the volume down button, then press and hold the side (power) button. Only when the Apple logo appears (it might take 10-20 seconds), release that button (ignore all other screens that might appear, the one with the "slider" to turn the device off included).

B) if the issue persists, try all the steps listed here:--> If you see No Service, Searching, or SOS on your iPhone or iPad

If the issue still persists, I suggest that you make an appointment (*) and have your device inspected at an Apple Store or AASP (Apple Authorized Service Provider) among this list:--> https://locate.apple.com/choose-country-region . After checking it out, they'll give you all the available options.

Regards

Giulio

(*) You can do it:

• Online:--> Genius Bar Reservation and Apple Support Options - Apple;
• Contacting a local Apple Store or AASP among the list provided above;
• Using the "Apple Store" app, available and downloadable from AppStore.

The same thing happened to me with the same phone. It turns out that my physical SIMM card in my phone failed. I contacted Verizon and they walked me through setting up an eSIMM - and electronic version of that card. The phone works great now.

Got it, thanks for the clarification.

Obviously it depends on the carrier, but a simple contact with your cellular carrier is always recommended in the situation Author has found himself in :).

Giulio

Hello ~ You should know in a little bit. Has anyone contacted you from emergency services or your emergency contacts?

~Katana-San~

In fact, that procedure is listed in many sections of the support article I posted in my previous reply, point B).

My point was that Verizon was able to fix the issue with a phone call. Thanks for the reply.

I was not able to use my phone after the SIMM failed. I used another phone to contact Verizon. As ProustGiulio noted, you could take your phone to an Apple Store.