The iPhone 5 is set to launch on T-Mobile this Friday along side T-Mobile’s new “uncarrier” no contract strategy. Not wanting to get left behind, Virgin Mobile is planning to win over T-Mobile’s pre-paid customers by offering them $100 to switch sides.

In a new ad campaign called “Retain Your Brain” Virgin is offering $100 to T-Mobile customers to move their number over to one of its unlimited plans that start at $35 a month and could result in $334 of savings over two years.

To get the $100 credit, customers need to buy a new smartphone Virgin, transfer their T-Mobile number over to Virgin, pick a plan and make a payment by May 31st, 2013. Once you meet the criteria, Virgin says it will credit $100 of free service to your account within the first 30 days of switching.

So it’s not like Richard Branson is going to come over to your house and shower you with Benjamins, but cheaper cell service is pretty nice too, and will pay off in the long run.