Originally Posted by CooLoser

I have a Nexus S 4G flashed to boost mobile. Everything works great and yes it is possible. There are guides but most do not work. The person i learned how to do this from was the user of 'kolosus'.

Also be aware if you want to flash to one of those carriers, you need to buy one of their cdma 3g phones and activate a plan to use it as a donor