Hard Reset T-Mobile SDA

Had tip: (nino and here)

Update 08/26/2007: I couldn't get this to work on my Cingular 2125 device. I finally figured out what I was doing wrong; I held down the power button too long. You do not need to hold the power button down until you see the boot screen... simply press it for 0.5-1 seconds. Also, Mike Poulson points out there are two ways to reset the HTC Torando/Faraday-based SmartPhone.

The first way requires you to be able to boot the phone and get to the start menu. The second is if you cannot do this (i.e., forgot PIN or will not boot all the way).

First way: Start -> Accessories -> Clear Storage

Second way:

1. Remove Battery

2. Replace battery
3. Hold down right and left soft keys
4. Press Power button for ~1.45 seconds then release Power button only
5. Confirm prompt to reset