I know ,you've heard it a lot:
It is not possible to use a custom warning sound for the original Tomtom safety cams!
Right ?
Wrong!!
And it is simple :
Either way create it on your computer (instructions at the end) or you can record a warning sound directly on your device using the following steps:
1. Tap Change preferences in the Main Menu of your device.
2. Tap Manage POIs.
3. Tap Warn ...