So here's something not covered or told to you anywhere from id mobile if upgrading your 4g phone to a 5g on.
You are told to simply insert your old sim card into your new phone and away you go. Yes, that's true unless you want 5g on your new 5g phone because if your old phone was 4g then the sim WILL NOT pickup 5g.
I only noticed this by chance some 4 weeks after upgrading when out shopping a 5g reception area and still i was only getting 4g.
You should be told that a si from your old phone WILL NOT work as described in the setup directions, you will only get 4g.
You need to upgrade your sim yourself to either a new 5g sim or a Esim, which i eventually have done.
Not good enough fro. id but hopefully this will help if anyone is having the same problem