Research in Motion’s BlackBerry PlayBook may be down, but it’s definitely not out. Over a year ago, the company revealed plans to release an LTE-compatible PlayBook as well as a 3G model that will work on HSPA+ networks. Details surrounding these variants have been few and far between, with some assuming they were simply canceled. As it turns out, two tablets from Research in Motion recently passed through the FCC equipped with HSPA+ connectivity and AT&T compatible LTE radios. BGR in January exclusively reported details about RIM’s plans to introduce a new PlayBook tablet around May or June that will be equipped with a 1.5GHz processor, built-in HSPA+ and NFC support.