Dell just announce will be release the Dell Streak 7 tablet next month with T-Mobile. The Streak 7 tablet is the first 4G tablet from T-Mobile and will works on GSM 850, 900, 1800, 1900, UMTS 850, 1700/2100, 1900, 2100 and bundled on T-Mobile’s 4G HSPA+ network for mobile broadband speeds up to 21Mbps.