Sometimes we learn about new smartphones and tablets once they are certified by the Bluetooth SIG, or the Wi-Fi Alliance. Many of the devices that receive such certification are unknown at the time that the proper documentation is made public. For example, the Wi-Fi Alliance has just certified a mystery tablet from Samsung with the model number SM-T378. There are variants to the slate which are listed as SM-T378S, SM-T378K, SM-T378L.
According to the documentation, the tablet will be running Android and supports the 2.4GHz and 5GHz frequency bands. We could find out all about this tablet later this month during MWC in Barcelona. Samsung recently disseminated an invitation for its MWC event and the invite featured the image of a tablet. We do expect to see the svelte Samsung Galaxy Tab S3 finally introduced after a false start last September. But the model numbers we've seen associated with this slate (SM-T820, SM-T825) don't match the SM-T378 model number seen on the Wi-Fi Alliance document.
So that leaves us with this mystery tablet, and the paucity of information about it. With Samsung apparently focusing on tablets at MWC (outside of a 60-second video teaser it will reportedly show for the Samsung Galaxy S8), perhaps we will learn about the SM-T378 and all of its variants in just a few weeks.