up date to ios 15.7 ,iphone7,cannot connect to celluar..error

• 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 - Apple Support

Note that there was a repair program for some iPhone 7 cellular issues that has long since expired:

iPhone 7 Repair Program for "No Service" Issues - Apple Support

Skinnydiva wrote:

Same issue.. I have iPhone 12 Pro though

Then try:

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

Same issue.. I have iPhone 12 Pro though

I have the same problem. I also just installed IOS 15.7.1, hoping that that would fix it, but it doesn’t.