Samsung Galaxy J1 (SM-J100) specifications leak, pointing towards new entry-level smartphone line
Although high performance is obviously not a priority here, the J1 will have LTE connectivity. However, it will have to settle for Android 4.4 KitKat instead of Android 5.0. But, judging by the spec sheet, this is a peppy low-end device. If Samsung doesn't make the mistakes of sticking a poor quality display, a fixed-focus camera, and an unjustified price tag in/on it, this little phone will fly.
By the way, it seems Samsung really is simplifying its smartphone lineup for 2015, as promised. Instead of Galaxy Core, Mega, Zoom, Young, Epic and the like, we're getting neat and tidy alphabet letters - just like with the Galaxy S5. Less devices and a more focused catalog is a welcome move by the company whose strategy of frantically producing overly similar devices mostly led to unsold stock and customer confusion.