Hisense, a company best known for its home theater equipment, isn't exactly a name synonymous with mobile devices. But with its new, Walmart-exclusive line of Android tablets -- the Sero 7 LT and Sero 7 Pro -- the Chinese manufacturer is dipping its toe into an increasingly crowded pool. Both tablets occupy the budget end of the spectrum, with the higher-end of the two, the Sero 7 Pro, going for a reasonable $150. For the price, the specs are decen
