If you’ve gotten yourself all worked-up about Sprint’s EVO Shift 4G from HTC, listen up. As we told you yesterday, the official Sprint launch date for the Now Network’s third WiMAX-enabled smartphone is January 9th. Best Buy will be offering pre-orders of the Shift to Reward Zone members on Thursday, January 6th and to the general public on Friday, January 7th. Your friends at RadioShack, however, will be selling the EVO Shift 4G tomorrow, January 6th, via its chain of retail stores. A memo obtained by BGR indicates that the Shack will provide you with the new 4G handset in exchange for $149.99 with a new two-year contract — no rebates (of any kind) required. And there you have it. If you need the Shift, the Shack’s going to have it… a full three days early.