Any major carrier*, any phone, any plan. To be eligible, you must register an existing active mobile or landline phone number by 2/12/12. Limit one registration per phone number (max. 5 phone numbers/family plan). $50 Best Buy gift card provided upon activation of registered phone number with purchase of a qualifying post-paid mobile phone with a 2 year agreement by 12/31/12. *Valid for AT&T, Verizon, T-Mobile and Sprint mobile phones only. T-Mobile activations which require a deposit (based on credit information) are ineligible. Not valid in Puerto Rico.