If you can't use your tablet as a personal Hotspot, there may be several causes of the problem.
To use your tablet as a personal Hotspot, you need to turn on the function and establish a connection from the other device to your tablet's Hotspot.
Solution: Use tablet as personal Hotspot
To use your tablet as a personal Hotspot, you need to key in the password you selected when you set up your tablet as a personal Hotspot on the other device.
Solution: Check the password for the Hotspot on your tablet and key in the correct password on the other device.