If you are going to try this, make sure you get your phone unlocked by your carrier before attempting. It is illegal now, in the US, to
unlock your smartphone so that it isn't carrier restricted without the carrier's permission.
Also, from what I know of the process, there are questions about the legality of switching your phone to Boost. Typically it requires buying a Boost phone and copying the ESID from that phone to your old phone, so that it will work on the Boost network. There are laws against doing this, the only issue is some claim it is not technically illegal as there is no malicious intent, that it is only illegal if the ESID on the old phone is flagged as being stolen (or other similar issue). Of course, if you combine with the new ruling that it is illegal to unlock phones without the carriers permission, I think that gives added ammunition that changing the ESID is illegal.