To fix the issue of automatic volume up on your mobile phone, you can try the following solutions:
1. Restart your phone: Sometimes, restarting your phone can fix the issue of automatic volume up.
2. Check for software updates: Make sure your phone is running the latest software version. If not, update your phone's software.
3. Check for app updates: If the issue started after installing a particular app, check for updates for that app. Sometimes, updates can fix issues related to volume.
4. Check for physical damage: If your phone has been dropped or exposed to water, it may have physical damage that is causing the issue. In this case, you may need to take your phone to a repair shop to get it fixed.
5. Reset your phone to factory settings: If none of the above solutions work, you can try resetting your phone to factory settings. This will erase all your data and settings, so make sure you have a backup first.
If the issue still persists after trying these solutions, it may be a hardware issue, and you should take your phone to a repair shop for further diagnosis.