The original Samsung Exhibit was a mere blip on T-Mobile's radar screen when it originally launched, being obscured by titans like the HTC Sensation 4G. The sequel, curiously coming out a whole four months after its predecessor, is ready to see if it can buck the trend and offer a decent option to those seeking an inexpensive Android device. Starting at $30 after mail in rebate and with a two-year commitment, it's poised to launch tomorrow in Walmart stores nationwide, with stock coming into official T-Mobile cha
