The next time you visit Walmart, you might see 4G tablets on display. The large retailer will carry two connected slates starting today, according to a T-Mobile announcement published on Monday. Both will use T-Mobile’s LTE service and include the carrier’s “free data for life” package, which amounts to 200 MB of free mobile broadband per month. Available now is the $179 Apollo Brands Trio AXS Quad Core tablet, a budget slate with 7.85-inch display. The tablet includes 16GB of storage with MicroSD expansion slot, front and rear cameras, a quad-core 1.2GHz processor and 1 GB memory. Coming next month is the HP Slate 7 HD for $229. This is HP’s improvement over last year’s model, with 1280 x 800 display, 16 GB of storage, microSD card and 1 GB of memory.