We can definitely provide you with some troubleshooting steps for when your cell phone crashes and freezes. Please Force restart your Samsung Galaxy Note 9. This may speed up the device. We also recommend that you close any open apps if possible, because keeping apps running in the background can slow your device. If you're still having issues, you can use our Troubleshoot & Resolve Tool to fix this. Simply select your device and the issue, then follow the steps to find a solution. Let us know if this helps.
Sean, AT&T Community Specialist
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