Cricket commented on their Facebook for those who have a Pocket phone:

"We encourage Pocket customers to have phones flashed by July 16 after this date Pocket phones will only be able to talk and text. Please visit or contact your nearest full service corp. Cricket store for full details on product offers. The competitor trade in free Android offer does not apply as Pocket was acquired by Cricket Wireless many months ago and the flash is a final transition for our current Pocket users to the Cricket system and coverage."

Source: Cricket Wireless' Facebook Page