I bought a sm-900p unlocked one from eBay India but I am facing problem regarding signal strength.

[RAJA SAGAR]

Signal strength Falling from - 89 dbm to 0 dbm for no reason even with the best networks. I did everything possible like factory reset, clear cache partition and everything available in the Internet but nothing worked. I need professional help. Is it because it's unlocked! But many other users are comfortably using it!

 

[B. Diddy]

Welcome to Android Central! What carrier are you using? The SM-900P is a Sprint variant, so this might not work very well on a GSM network (since Sprint is a CDMA network).