For a few days I've had no signal bars regardless of where I am in town.

[Tiggy]

My Samsung S20 FE 5G phone suddenly has zero bars all the time, but I'm really near two towers and this doesn't change regadless of where i am in town. 

[Geluk]

Check network coverage by inputting your postcode into 3's network coverage page.

[robertm1988]

Most users on here don't recommend the network coverage checker. In my town we had 5G for a day, even 4G is patchy and only getting H+ in most areas. Obviously this needs to be addressed by the end of next year.

[Suzy1234]

Yes, I’ve had the same. I get maximum of two bars and can only call out when I’m connected to my Wi-Fi indoors. Has yours improved yet?