does your phone have mobile hotspot and USB tethering problem.I also faced the problem and after so many days finally, the problem has solved.this problem occurs due to many reasons it can be the ROM problem or due to missing configuration files
steps for solving the hotspot and USB tethering problem
1) turn on your smartphones it can be redmi 1s,redmi 2 prime etc
2)go to security and then click on data usage and then click on restrict data usage.
3)you will find two option installed and system and after that click on system and then click on android system which was crossed.
that’s it now the problem has solved you can use the mobile hotspot and USB tethering
if you face any problem then comment below the section