Tesco mobile runs on the o2 network not it’s own system.

You should be able to check via your phone which systems it will receive through the settings and networks.

You should also be able to check the signal strength at your postcode for each of the network providers. Try indoors and just outside your house.

Some years ago you could get a signal booster from Vodaphone and others but I think that was stopped say 5 years ago.

I have been thinking of buying a signal booster that they make for caravaners. However we do not use our mobile phones much.

Our main contact with family and friends is by FaceTime and massaging with Apple iPads and phones.

There is WiFi calling but that is contract based at additional cost which our family use because of business.

Allan C.