If you're one of the lucky people who managed to get on Sprint's SERO (Sprint Employee Referral Offer) plan, you'll be upset to know that the Palm Pre won't work on it. If you're not familiar with it, the plan was only available to consumers who were referred by a Sprint employee. The minimum SERO plan started out at $30 per month for 500 minutes, unlimited text messaging, and unlimited data. Unfortunately, it is no longer available and replaced with the Everything Plus plan. If you're looking to upgrade to the Pre, you'll be required to change plans. It'll need to be placed on an Everything Data or Everything Plus plan in order to work.