Motorola Milestone Soft reset
Crash recovery - Restarting Motorola Milestone XT720
If your phone stops responding to touches and key presses, try a quick reset. Remove the back cover and battery, then replace and switch your phone on
left Shift+right Alt+Delete = restart Motorola Milestone
Motorola Milestone Hard reset
To reset your phone to factory settings and erase all
the data on your phone, touch Menu > Settings
> Privacy > Factory data reset > Reset phone.
Warning: All data on your phone will be deleted.
Motorola Milestone Hard reset using keys
Power off device. Press kamera key + power key for about 10-12 sec (even 15 sec) (You will see Motorola logo then a yellow exclamation point in a white triangle.)
Press both (1st) Volume UP + (then) camera key in this order for Android System Recovery menu
Select Wipe / Factory reset with Volume down key (or with D pad) then press POWER key (or CENTER D Pad) to hard reset Motorola Milestone.
BONUS: Motorola Milestone bootloader
Device off: D-PAD + POWER key