My area is fully covered on both Warid and Zong LTE coverage map, but still i get 1-2 4G signals indoor maximum at ground floor, no signals in basement.
Both network base station are within ~1 km away from my house.
So its better to check coverage with the device itself, before you purchase it.
I don't trust these coverage map too much, they are just an estimate.
I get 1 bar 4G signal strength while typing this [emoji14].