With one of these you get your bars
How to Fix 5G – LTE Not Working on iPhone iOS 17 [2024] 5G Missing on iPhone
5G is an incredible technology that brings fiber-like internet speeds to your phone. That is, as long as your phone can find the 5G signal and lock onto it.
If you think you should be getting a 5G network connection, but your Apple iPhone or Android phone won't switch to the correct network mode, here are some practical solutions.
This may seem crazy, but does your phone support 5G? Sometimes different versions of the same phone don’t all have 5G.