Share your experience!
Can you tell what network mode are you using?
2G can be used for data too,but it is slow. So you are using 2G and stil have coverage problems?
Have you ever thought the SIM could be faulty?
This sounds more like the area you are in has bad reception or other factors are causing interference and blocking signals
Yeah,agree with Thommo. Maybe even the building where you work could cause screening effect.