This hack does not stay in place after soft reset.. I use alltel...
With any and every registry hack you do understand you do them all at your own risk. I, as well as PPC-Central and it's staff, assume absolutely NO responsiblity to what happens to your phone. As always BACK UP, BACK UP, BACK UP!!!
Here is a real quick and cool one.
It is a registry hack to change the "Sprint PCS" on the phone screen(when you make a call). Open up your Reg Editor. I recommend using the PHM Registry Editor For Pocket PC since it is freeware.
Go to the following menu once you have the reg editor open.
(HKLM stands for HKey Local Machine)
HKLM\System\State\Phone\Current Operator Name
Then change it to whatever you want. I have "Bob's Phone" on mine. I would suggest not putting that on your phone- well unless you really want to.