Switch and Save promotion. Boost will give you $100 for porting a number from a non-Sprint related operator to Boost.
The specifics of the deal are; customers who port a phone number from any non-Sprint carrier (not Sprint, Virgin Mobile or a Sprint MVNO) to Boost between 4/8/14 and 6/30/2014 will get $100 off the price of a new Boost phone when they purchase and activate the phone on a new Boost account at a participating Boost Mobile dealer in "select markets" (store locator).
Boost isn't telling us what those select markets are or which dealers are participating so I recommend calling and verifying that the deal is available before heading out to your favorite dealer.
You can also get the $100 with phones purchased online. Customers purchasing a new phone (certified pre-owned phones aren't eligible) from boostmobile.com between 4/8 and 6/30 and activating it on a number ported from a non-Sprint carrier by July 13, 2014, will receive a $100 account credit within two weeks of activation. More more information visit www.boostmobile.com/switch.
Updated 6/1/2014: Promotion extended through 6/30/2014.