Just to clarify, do you want to reset an Android device or a FirefoxOS device?

Is this to resolve a specific problem, or to completely erase all data on the device?

This looks to be a Firefox OS question given the user's other question.

Firefox OS. I need to erase all phone no's at one. Time. thanks.

I need to erase all my phone book and videos songs. So I deside format internal storage or reset my Firefox OS.

Hi tamilazhagan2k3,

To reset the media stored in your Firefox OS device, please follow these steps:

1. Go into Settings
2. Tap on Media storage
3. Tap on "Format SD card" on the appropriate storage that you wish to erase.

Please note that this will remove ALL the photos, music, and files in your device.

I hope you find this information helpful. Please let us know if you have any other questions about your Firefox OS device.

Thanks,

- Ralph