If you turn on the Automatically turn off personal hotspot in Settings > Connection & Sharing > Personal Hotspot, when you turn on the hotspot and no device is connected, the personal hotspot will be automatically turned off after 10 minutes. When the phone is in a high temperature, in order to protect your phone, it will automatically turn off the hotspot (there will be a reminder in the notification bar).
Since the personal hotspot consumes more power after it is turned on, it is recommended that you turn off this function in time, which can effectively help you save power.
Additional Steps:
Check your hotspot settings. Ensure that the hotspot timeout setting is set to a value appropriate for your needs. For example, if you want your hotspot to stay on even when no devices are connected, you should set the timeout to "Never".
Disable battery saver mode. Battery saver mode can automatically turn off features that drain battery life, including the Wi-Fi hotspot. To disable battery-saver mode, go to your phone's settings and look for the battery-saver option.
Restart your phone. Sometimes a simple restart can fix minor software glitches.
Update your phone's software. Make sure that you have the latest software installed on your phone. Software updates often include bug fixes and performance improvements.
Reset your network settings. Resetting your network settings can fix a variety of network problems, including Wi-Fi hotspot problems. To reset your network settings, go to your phone's settings and look for the network reset option.
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