Here is what you need to do:

1. Download GetSPC
2. Unzip to desktop
3. Turn off phone and remove battery.
4. Write down your HEX ESN
5. Power your device back on
6. Connect via ActiveSync or WMDC
7. Copy entire folder to main memory on device.
8. Run GetSPC.exe
9. In the top box type in your HEX ESN(make sure caps is on)
10. Click generate or whatever the button is named
11. The resulting number should be a 6 digit number, your MSL, write it down.
12. Search for, download and install Qualcomm's QPST tool.(not freeware)

THE FOLLOWING STEPS ARE VERY DANGEROUS SO MAKE SURE YOU FOLLOW MY DIRECTIONS EXACTLY.
13. Run QPST Configuration(run as admin if Vista)
14. From the Dialpad, dial ##3424#(##diag#)
15. Connect device to computer via USB(this will install drivers)
16. In QPST Configuration, click ports.
17. Continue to add ports until the QPST Configuration detects your phone
18. Under active phones it should display your phone.
19. Click Start Clients/Service Programming
20. Select phone and click ok.

DO NOT LEAVE FIRST TAB, THE SETTINGS TAB. THIS IS THE ONLY TAB WE WILL NEED TO CHANGE ANY SETTINGS

21. Under the settings tab, click Read from phone.
22. Input your MSL you got from GetSPC earlier.
23. Under codes where it says Service Programming, change this to 000000
24. Click Write to Phone
25. Wait 1 minute
26. Close Qualcomm QPST one window at a time.
27. Disconnect the USB cable from your device
28. Perform Soft reset once
29. Test new MSL(##000000#)
30. If new code does not go through, hard reset.

31. Depending on what device you have, follow the necessary steps to unlock your phone so you can flash a new ROM to it.

32. Install OEM ROM from carrier of choice or build your own custom ROM using the new carrier's information.

33. Follow instructions to flash new OS to device.

34. Call service provider and do some sweet talking to get them to activate the phone on their network. You may need to do some serious sweet talking because Sprint ESNs are not in Verizon's database and vice versa. This goes for all CDMA carriers.

SOURCE: Activate Sprint phone on Verizon, Altell, etc... Network. - PPCGeeks

Another option from the same source:

First check with the carrier you intend on using your phone on to see if they can and will accept it.

Call Sprint, ask them for your MSL, they will ask you for the ESN. You can play this sneaky if you want but don't need to, by telling them you needed to manually program your MSID and MDN but need the 6 digit code MSL.. YMMV, remember Sprint got sued and lost, they have to provide you with the MSL..


Go here Corolada PRL Page and download the latest PRL for the carrier you are wanting to use. Copy this to the phone (device).

Type ##PRL# on the phone's dial pad, enter the MSL and choose to edit the prl, choose load, it will look on your device for available prls, load it up let it do it's thing, reset the phone.

Type ##PST#, edit, enter MSL, look for SID/NID.. Edit those to the appropriate settings for your new carrier. You can go here PRL Interpretations to look up the PRL interpretations. Using search and find, look for the city you're in for the SID (tower #) in your area and enter it if you don't know it.

Call provider give them the info they need and follow their instructions on reprogramming your phone. Usually ##MSL# (Your MSL) then you can edit the MSID MDN.. *228 should work now, you may have to try *228xx (00-99) combination to get your carrier's activation team if you didn't get the SID right.

Your phone should work from there..

If you want to further customize or use the carrier's rom for the same device, if there is one available. You can just unlock the phone and load up that carrier's rom for your particular phone. To get features working for that carrier..

Another thing to take into mind is that you become your own tech support for any issues with your phone.