I am using MTNL-Mumbai Dolphin connection for last 4 years. Recently I shifted to new office where the signal is very low 40-50% due to which I cannot receive calls. (calling party gets out or range message).
The signal is good near the window but in my cabin it is very low.
Is there any device signal booster or other device which I can install in my office or mobile so that signal is increased ?
Regards
Ravi Modi