1. Hold down the Power button for about 30 seconds.
2. If this doesn't work, charge your phone for at least 5 minutes. Then, while connected to the charger, restart again by holding down the Power button for 30 seconds.

If your phone freezes more than once, check for a larger issue.

Restart your phone to unfreeze it, and then try these troubleshooting steps:

1. Check if a software update is available for your phone.

2. Check available storage and clear space if needed.

   You may see issues if your phone's internal storage is almost full. To free up space, remove unnecessary files and clear cached data.

3. Check for app updates.

To remove any processes that may be causing the issue, reset your phone to factory settings.

A factory data reset will remove all data from your phone.