Answer(১):- 1) low battery.
2) virous problem.
3) touch slow.
4) phone working slow.
5) the phne to be hot
Answer(২):- 1. Operating system problem
2. Display problem
3. Software hang
4. Update problem
5. Touch problem
Answer(৩):- 1.Google Play Store Crashing
2.Insufficient Space on Device
3.Google Play Store Not Downloading Apps
4.System UI Not Working
5.Downloads Not Working
Answer(৪):- 1.battery down,2.viruse,3.sreen unfit,4.hang,5.call down