I can't use my Apple iPad Pro 12.9 (2020) iPadOS 13.4 as a personal hotspot
Cause 1 of 2: The password used on the other device is incorrect
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.
