I have switched from oppo F1S to Samsung A70. My Oppo phone works fine with great signal strength. But Samsung Having very low signal strength as compare to Oppo. No browsing with 1 or 2 4G bars. cannot browse on full 3G signals. Next i also compare its signal strength with other samsung phone which is quite low. it shows only -110dbm indoor but -98dbm outdoor. Also facing issue of call drop with notification of No signal. Also visit service center of Samsung here in pakistan but they cannot identify the problem as their office is on 5th floor where signal strength is excellent. what i have to do now?