Suddenly lost cell service

I've had this phone since new, used it for about two years, when suddenly overnight I lost all cell service. I was working fine when I plugged it in but when I woke up, it showed no bars and the signal strength says "0". I switched to my spare phone and pulled the back off(after the signal issue) as the battery was getting poor on this phone, but I would like it as a spare. Where does one start about the signal issue?

Wifi calling does work.

In service mode menu it does say: ASM MIPI DEVICE FAIL

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0

crwdns2944067:03crwdne2944067:0:

What provider do you have? There are dialer codes that can help re-register your phone with the network

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

Verizon wireless

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

@yukamoran Verizon

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crwdns2934285:0crwdne2934285:0