I thought this was specific to my area but just travelled about 15 miles away and same problem little or very weak signal. Area post code Dh3 2hy. Wife uses I’d and has same issue , she was given a replacement sim but made no difference at all. This issue has been ongoing for about 8 weeks now.
I have been told by someone local, but not sure of if it legit , that a while ago the local signal mast was taken down to prepare it for 5g. The mast has indeed gone but I can’t seem to get any more info on this.
I have taken a look at the postcode provided and there does appear to be a known issue in the area and our team are currently working to get his resolved as quickly as possible.
Also, with 3G no longer being available, we would recommend ensuring VoLTE is enabled on your handset. Further details are available here.
If you have any questions, please do get back in touch.