Another vivo handset passed through Chinese certification agency TENAA and we got some key specs as well as a couple of shots. The listing for the V1921A reveals a 6.38-inch screen with a UD fingerprint scanner. Around the back, there's a triple camera setup and a generous 4,420 mAh battery. vivo V1921A profile Visually the device resembles the vivo V1913A/T which slipped through the certification ranks a while back. The two also share the same screen size and fingerprint reader. Rumors suggest that the V1921A will be part of vivo's Y-series and will make its debut in China...