Poor signal and Internet - Samsung S20 Ultra

[BacardiMan]

I have recently moved from Virgin to O2.  I now have a poor signal inside my house, i get one bar at best (some calls simply do not connect) and outside, internet around my local area is very poor.

Do i need to check any settings as the coverage checker states i shouldnt have an issue.

Thanks

[LeeS1980]

Likewise I’ve moved from EE and wish I hadn’t, the signal is terrible, I’ve decided to cancel my contract and will be going back to EE where I could get 5G, I’m only getting 3G with glimpses of 4G 

[MI5]

@BacardiMan 

Check guide here Guide: How can I sort out my network issues?