There’s a new offer of 15,000 United miles for each new SprintPCS line activated online. The offer seems to be valid through January 31. But I’m just not sure how those 15,000 miles are awarded, as the terms and conditions state

Customers will earn up to 10,000 Mileage Plus miles per new line of service, awarded in two installments – 5,000 miles six to eight weeks after the first and sixth Sprint PCS invoices. Customer will earn up to 5,000 additional Mileage Plus miles – 2,500 miles six to eight weeks after the first and sixth Sprint PCS Invoices – if customer signs up online.

But that’s only 10,000 miles.

UPDATE: I shouldn’t post (or attempt to understand the fine print of mileage offers) in the middle of the night! The numbers add up just fine, as pointed out by meecal in the comments section.