Motorola's new Moto X series
Motorola's new Moto X phones at a launch event in New York on Aug 1, 2013.Reuters

Motorola's flagship series Moto X belonged to a class of its own, but the company floated a new Z family and released three smartphones, Moto Z, Moto Z Play, and Moto Z Force, convincing everyone that the X-series had been killed. However, a mysterious device has been leaked online, sparking off talks that the Lenovo-owned company could be bringing back the X-series, possibly with the 2016 version.

[Read: Android 7.0 Nougat update schedule for Moto Z, Z Force, Z Play and others]

A new Motorola device with model number Motorola XT1662, believed to be Moto X (2016) or Moto X (4th Gen), was spotted on GFXBench benchmarking site with a 4.6-inch full HD touchscreen with 1,920x1080 pixel resolution, an octa-core MediaTek MT6755 Helio P10 processor clocking at 2.1GHz, an ARM Mali-T860 GPU, and an Android 6.0 Marshmallow. It renewed hope on Moto X fans that the fourth generation handset could be on its way, but silence followed after that.

After months of silence, popular leakster Evan Blass aka @evleaks posted a mysterious Motorola smartphone on his Twitter page and it has sparked of speculations that it could be Moto X (2016) because of its resemblance to the X-line.

However, the Lenovo-owned smartphone maker hasn't uttered a word on the revival of Moto X-series ever since the release of its newly floated flagship, Moto Z family. So, one has to take the reports of X-line revival with a pinch of salt.