The Redmi 2/Prime comes preinstalled with Android 4.4 KitKat with the proprietary MIUI 6 custom graphical user interface, it can be upgraded to MIUI 9 based on Android 4.4 KitKat (for Redmi 2) and Android 5.1 Lollipop (for Redmi 2 Prime) via OTA. The Redmi 2 comes with a factory-unlocked bootloader, allowing users to "root" the device and install custom firmware.
The software-development community has released custom ROMs and kernels for the phone, even though the official kernel sources from Xiaomi were only released a year after launch.[3][4] The Redmi 2 has achieved unofficial stable builds of CyanogenMod 11 (based on Android 4.4), 12.1 (Android 5.1) and official nightly builds of CyanogenMod 13.0 (Android 6.0.1) and CyanogenMod 14.1 (Android 7.1.1).[5][6][7][8] Development of the latter version is continued in the LineageOS project after CyanogenMod's discontinuation.[9] From LineageOS builds Redmi 2 is currently getting official nightly builds of LineageOS 17.1 (Based on Android 10). Redmi 2 has also achieved official stable builds of Resurrection Remix (based on Android 7.1.2, Android 8.1),[10] official nightly builds of AOKP (based on Android 8.1),[11] official stable builds of MoKee 6 (based on Android 6.0.1), MoKee 7 (based on Android 7.1.2), MoKee 8 (based on Android 8.1), official nightly builds of MoKee 9 (based on Android 9.0.0)[12] and official builds of Mokee 10 (based on Android 10).[12]
Hardware
The Redmi 2 is powered by a 1.2 GHz Snapdragon 410 SoC with Adreno 306 graphics engine. It features 1 GB of RAM and 8 GB of storage. The Redmi 2S, also called Redmi 2 Enhanced or Prime (depending on locale), has 2 GB of RAM and 16 GB of storage.[13] The display is a 4.7-inch IPS panel with touch capabilities, 1280×720 resolution at a density of 312 ppi with scratch-resistant AGC Dragontrail glass.
Parts Providers
Processor: Qualcomm
Modem: Qualcomm
PMIC: Qualcomm
Wifi/Bluetooth: Qualcomm
Connectivity: Qualcomm
Audio: Qualcomm
RAM: Samsung, Micron, Elpida
Storage: Samsung, Micron, Toshiba
Display panel: Sharp, AUO, BOE, EBBG
Touch: Focaltech, Atmel
Camera: Samsung, OmniVision
Battery: Coslight, Sunwoda
Variants
Redmi 2 was updated with two models, namely Redmi 2 Prime (India) and Redmi 2 Enhanced (China), with 2 GB of RAM and 16 GB of storage, twice that of the standard model. There were several variants of the standard and upgraded model for different markets, with varying baseband support.