For Hard reset Motorola ROKR E6 use following steps
1. Turn off your smartphone, in any available way
2. Press the 2 buttons Volume up and Power at the same time for a few seconds
3. Hold down the keys until the Boot Mode menu appears
4. You need to go to the Recovery menu line. The Volume up key can be used to navigate and the Volume Down key to confirm the selection
5. When Android Robot appears on the screen, press the Volume Up and Power keys
6. You need to go to the menu line "wipe data / factory reset", the Volume Up / Down keys are used to navigate the menu, and the Power key is used to confirm the choice made
7. Select "yes" and press the Power button
8. In the menu, go to "reboot system now"
9. Hard Reset (reset to factory settings) done
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