There's some good news today for T-Mobile customers looking to add a few more Nexus devices to their lives. The carrier announced today that the Nexus 7 tablet is now available to order with a T-Mobile SIM from the Google Play store, where it will set you back the same $299 as the regular HSPA+ model (still 32GB only). What's more, T-Mobile has also confirmed that, as expected, it's expanding retail availability for the Nexus 4. That rollout began yesterday, and the carrier says all retail locations in the US should have the tablet in-store within the "coming weeks." You'll also be able to order it from T-Mobile's website beginning January 23rd.