Vivo has quiety unveiled a new variant of the premium X21/ X21 UD smartphones. The Vivo X21i, as it is known, has the same notched 6.28-inch Full HD+ 19:9 AMOLED display with 90.3% screen-to-body ratio, AK4376A Hi-Fi audio chip and runs FunTouch 4.0 (built on Android 8.1 Oreo OS). The Mediatek Helio P60 octa-core SoC […]