Whatever it is, the Samsung SM-T2558 is certainly an unusual product. If you compare it to Samsung’s other 7-inch tablets (like the Galaxy Tab 4 7.0 SM-T230, or the Galaxy Tab 3 7.0 SM-T210 from last year), it’s definitely narrower, while also being taller.
The SM-T2558 was approved by Chinese authorities earlier this month, and seems to be made for China Mobile. It runs Android 4.3 Jelly Bean, while its 7-inch display has a 720 x 1280 pixel resolution. Other features include TD-LTE and TD-SCDMA connectivity, an 8MP rear camera, 2MP front-facing camera, quad-core 1.2GHz processor of unknown provenience, 1.5GB of RAM, and microSD card support (up to 128GB).
Although the SM-T2558 is made for China Mobile (which will likely start selling it soon), it doesn’t mean that Samsung can’t make a similar device for other markets. But the question is: do we want it to?
For the sake of comparison, we quickly put the 5.1-inch Galaxy S5 (142 x 72.5 x 8.1 mm) next to the SM-T2558 - so you can make an idea of how big this thing is. You'll see this in the last image included in the slideshow below.
source: TENAA (translated) via MobileGeeks (translated)