Lenovo Vibe S1 surfaced back in February and recently got certified on TENAA. According to @upleaks, the smartphone feature dual selfie cameras on the front. Even the image revealed by TENAA showed two sensors on the right side of the earpiece. According to new rumors, the smartphone will have two 5-megapixel cameras on the front. It is not clear how this would help in capturing better selfies. @upleaks also got hold of a new image of the smartphone that shows a fingerprint sensor on the back, different from earlier images.