According to the leaks, the device carrying model number Y51L and Y51 have budget specifications. Both the devices are placed close to each other in terms of specifications, so close that the exact difference (apart from the Android version on both the devices) isn't clear.

Specifications:

1. Both the smartphones are powered by a 1.2GHz processor
2. 2GB RAM
3. 16GB of internal storage
4. 8Megapixel primary camera and a 5Megapixel front facing snapper
5. Android Lollipop 5.0 for Y51 and Android Lollipop 5.0.2 for Y51L

Since most of the devices on Vivo's assembly line-up have been leaked on TENAA, it is safe to assume that the devices will be launched in the coming weeks.