T-Mobile’s been planning an update to its current Cel-Fi home signal boosters it seems and your curiosity regarding the RS3 should be satisfied now. At least for the short term. Uncovered by a Reddit user Bulls729, both the new Windows Unit and Coverage Unit filings have been published by the FCC.

As you can see, there’s been something of a redesign. In my mind, it’s by far the most visually appealing.

Window UNit

Coverage Unit

For those curious, the Window Unit FCCID is YETD24NU while the Coverage unit is YETD24CU. Hitting each of those links will take you to their filings on the FCC page giving you as much detail as you could need. We’re not 100% sure on when these will roll out to customers, but the Reddit user did call a CS agent who advised him to call back in three weeks. Which could mean it’ll be out then, or that she was simply trying to give as realistic a time frame as possible without saying “I don’t know”.

His post states that RS2 users should be able to upgrade to the newer model, providing they send back the older one first. We suspect that in order to qualify for one, the criteria is similar to current models: You need at least 1 bar of signal (in this case, LTE) in your house for the device to work.

The device has also shown up on Nextivity’s support pages as the “RS3 Duo”. Early indications suggest it’s compatible with LTE/HSPA+ bands 2 and 4. We’re yet to see confirmation of that yet, but we’ll update this post if and when we find out more.

For a full gallery of images detailing design, internals and user guides, hit this link.