Poor signal

[Alnjo]

Since upgrading to a Samsung A53 5g my signal is terrible. 

My wife has the A54 5g,  both on 02. She gets good signal and 4 or 5 g in places I get nothing.

I've tried everything with the phone ( factory reset,  setting changes,  turn this on , turn that off ) its very frustrating .

I had no issues with my old Huawei,  except the battery. 

[Cleoriff]

@Alnjo 

Check these guides

Guide: How can I sort out my network issues? 

Guide: Is the network down for me or everyone? 

Guide: Do you have poor coverage / signal Indoors? This may help Explain / resolve it 

You may want to go instore with ID for a new sim.

[Enlli]

Can you swap SIM cards with your wife. If you still have problems could be the phone or setting

If the problem moves to your wife's phone then as a first step I would suggest a SIM replacement 

If you can, call into an O2 Shop with photo ID