I don't think it needs to be flashed, its unlocked and can operate on most GSM and some CDMA bands. Since Cricket's parent company, Leap Wireless International, was acquired by AT&T on July 2013, expect future phones to have GSM bands.
Galaxy nexus is better
You can get your galaxy S 5 (sprint) flashed from George Hotz.
The Galaxy Nexus was released on November 2011.
Galaxy Nexus was created on 2011-11-17.
There's no Samsung Galaxy Nexus 2 model yet.
Sprint did offer the Samsung Galaxy Nexus during its run.
Since the Nexus S, Google brought out the Galaxy Nexus, Nexus 4, and Nexus 5.
yes.
no
yes
Yes, it can. It can be flashed talk/text/internet only! No picture mail is available for these phones.