Having a look on OpenSignal shows a mixed bag of signal reports for your street in St Helens.
Have you tried your sim card in a different handset? Have you tried TuGo ?
As
@MI5 said alway best to test signal with a PAYG sim, before committing as not everywhere has a mobile signal even these days
Indoor coverage is never guaranteed as there are so many factors involved, such as thickness in wall, as Radio Waves will only penetrate so far.
A phone wont always lock onto the nearest mast, it will hope between masts in an area, trying to find the least contention to allow you to use features.
- Xperia 1V - o2 and Spusu
- Pixel 8 Pro - o2 and Vodafone UK