Network issue in my A36 while someone try to call me or I try to call someone. Call not connecting.Kindly someone suggest to solve this problem

When will A36 will get One UI 8.5

My galaxy store not opening its showGalaxy store keeps stopping

In my J7 Pro When incoming call when I pick the call phone ring continue ringing even after pick the call and no answer from other side after some time call ended without answering. Plz anybody tell me solutions.