iPhone 7 Plus software update
I have updated latest software iOS 15.4 & 15.4.1
My phone acts weird now. No phone calls possible. Lot of noise when try to call somebody. No dial tone. Lot of noise. Camera doesn’t work well.
what is the solution.
Check first the range of the mobile network, see this Apple article: If you see No Service or Searching on your iPhone or iPad
If you see No Service or Searching on your iPhone or iPad - Apple Support
Then see this Apple article: If you can't make or receive calls on your iPhone
If you can't make or receive calls on your iPhone - Apple Support