Find out how to hard reset T-Mobile SDA : Click Start > More > More > Accessories...

Restarting your Phone

Occasionally, you may want to restart your phone, for
example, when a program is not performing properly or the
phone does not respond to any keypresses.

To restart the phone

1. Remove the battery.
2. Reinsert the battery and turn on your phone.
If the phone is restarted while a program is running, unsaved work
will be lost.

T-mobile SDA hard reset

Resetting your Phone

Resetting your phone will remove all the data from the
its memory which include contacts, tasks, calendar
appointments, and more, and restore the phone back to the
factory default settings.

To reset your phone

1. Click Start > More > More > Accessories > Clear
2. Follow the on-screen instructions to reset the phone.
The phone will restart after it has been reset.