There is currently a special on T-Mobile.com that if you purchase a SDA you will receive a free 1GB SD card. Plus, it comes with a $50 mail-in rebate.
To qualify for 1GB SD Card and Mail-in rebate, the product must be activated with any individual or enterprise T-Mobile rate plan with a monthly access fee of at least $34.99/mo. per line of service or at least $49.99/mo. for up to 5 lines of a FamilyTime® plan.
You can check it out here: T-Mobile SDA phone details from T-Mobile
It's a limited time offer, so if you're interested you better hurry!


See More: SDA on T-Mobile.com