The oft-rumored Facebook smartphone, the HTC Myst, is trying to get back on everyone’s radar. This time, the phone has been spotted paying the FCC a visit, bringing along with it a slew of wireless radios.

According to the filing, the Myst is equipped AT&T-compatible LTE radios – all four of them. This confirms our suspicion that a ménage a trois between HTC, Facebook, and AT&T is in the horizon. And as is usually the case when the docs are made available online, the Myst has been given the agency’s seal of approval to thrill its future users.

That’s about all the juicy details that FCC provides. But of course, we already got the full scoop on the phone’s specs. They haven’t been officially confirmed by the parties involved, but considering the source, it’s safe to assume that these are pretty legit.

The HTC Myst is expected to come with a 4.3-inch 720p display, a dual-core 1.5GHz Snapdragon MSM8960 processor, 1GB of RAM, 16GB internal storage, 5-megapixel main camera, 1.6MP front-facing cam, LTE, and Android 4.1.2 Jelly Bean.

Can’t hardly wait to see the Myst hits stores? Rumor has it the phone will be launched this spring. We’ll keep you posted.

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