Cricket Wireless is offering Prepaid Lumia 630 for Free using a mail-in rebate of $50 in US. The device is usually sold at a no-contract price of $49.00 by Cricket Wireless. The $50 rebate seems valid with Cricket Visa Promotion card.
So, in case you want to go with Cricket Wireless and Lumia 630, this may be the deal to go for. If you want to know more about Lumia 630, must read our in-depth review.