According to Weibo listed Tech Web, the Mi 2015811 is the Redmi 3. The handset sports a 5-inch TFT display with a 720 x 1280 resolution. Under the hood is an octa-core 1.5GHz CPU. 2GB of RAM is inside, along with 16GB of expandable internal storage. A 13MP or 8MP camera is on back, with a 5MP camera in front for selfies and video chats. Android 5.1 is pre-installed. The Mi 2015811 measures 8.5mm thick, and weighs in at 143 grams. It will be offered in Silver, Gray and Gold color options. The device supports 4G LTE, 3G, Wi-Fi, Bluetooth, GPS, and USB connectivity.
Also receiving TENAA certification is the Xiaomi Mi 2015812. This unnamed model comes with a 5.5-inch display and apparently features the Snapdragon 808 chipset inside. That would explain why the phone is powered by a hexa-core 1.8GHz CPU. 2GB of RAM is inside, along with 16GB of native storage. The camera on back is either 8MP or 16MP, and a 5MP front-facing camera handles selfies and video chats. A fingerprint scanner is offered on the back of the unit, and Android 5.1.1 is pre-installed. The Mi 2015812 is 8.7mm thick, weighs 166 grams, and will also be offered in Silver, Gray and Gold. The model supports 4G LTE, 3G, Wi-Fi, Bluetooth, GPS, and USB connectivity.
As usual, TENAA has provided photographs of both models which you can view by clicking on the slideshow below.
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source: TENAA (1, translated) (2, translated) via TechWeb, Mobipicker