Rubel7114 , via OnePlus 6 , Sep 21, 2020 : My oneplus 6 shows network signal but i can't able to call or someone who try to call me, find my number off. This problem occurs more in indoor situation where the network signal is comparatively weak. Sometimes it happens in good signal also. So at home, i can't use my phone. It is not network Carrier issue because my Grameen Phone SIM works fine with other phone. I am using this phone for nearly two years at this home but the problem starts from two weeks ago. My other family member also using same carrier SIM without any issue. To solve the problem, I changed the SIM slot. Reset network. Switch network 2G/4G. Wipe cache. Reset network APN etc. But nothing works. It seems like to me, may be my phone's network reception ability becomes weaker so that it can't perform in indoor or week signal area. So I'm confused is it a hardware issue or software bug? Plz help me.