Both sites show that the 3G and 4G signal in your area is very good, which means your phone should work outdoors and inside most houses, with variable coverage in commercial buildings. Please be aware that these checks are only a guide and is not a guarantee of service availability in a particular location. It shows outdoor coverage only. As with all radio-based systems, service may be affected by a number of local factors, such as building materials, tree cover and weather conditions.
The EE Coverage Checker also shows: WE RECENTLY FIXED A PROBLEM IN TW20.
Is your signal better now? If you are still experiencing a problem with a weak signal in your house, please let me know the following:
Do you have signal problems when away from home?
Do other networks have a signal problem at your property?
Does your signal improve if you put your SIM card in a different handset?
Have you tried replacing your SIM card?
Virgin Media Forum Team
Need help changing SIM card? Find out more about activating your 4G ready SIM. 4G SIM Swap Help
Both VM and EE coverage maps are very broad region maps. They do it by theory not measuring coverage. I have the same problem, the map says good but I have to drive a mile away to get a good signal. Honesty on the maps would be a good start.