T-Mobile is again offering a free $30 refill PIN with most prepaid phone purchases at T-Mobile.com. The only phones the card isn't offered on are the entry level Nokia 1616 and LG GS170 and the Nokia Nuron Symbian smartphone.
T-Mobile's free refill offers usually only last for a day or two so don't procrastinate if you want to take advantage of this deal.
Update: 25-Jun-2011 - The free refill offer has ended.
Via: Howard Forums