The call quality is most closely related to the call environment. In buildings, corridors, basements and other places with complex structures, these locations usually belong to areas where communication signals are seriously blocked.

Why is there a big difference in cell phone signal strength between different rooms on the same floor? This is also related to signal blocking. The intensity of signal reception is mainly related to the distance from the base station. The closer the distance, the stronger the signal will be, and if the signal meets a wall, it will weaken. If the room is just opposite the base station and there are many walls or obstacles on the side facing the base station, this will happen even on the same floor.

At the same time, the density and floors of nearby buildings will also affect the signal transmission. The closer the building layout is, the worse the signal reception may be.