TWRP is the most famous custom recovery mode and it is mainly used to obtain root permissions on Android phones. Unluckily, this custom recovery mode is not available for every phone on the market, but from today new models of Xiaomi phones are supported. The support of TWRP recovery mode has been extended to Xiaomi Redmi 3S, Redmi 3S Prime, Redmi 3X and Redmi 4A.
These are among the cheapest phone actually sold by the company: 4A, for example, is the cheapest phone from the last generation. You have two ways to download TWRP recovery mode for your Xiaomi Redmi 3S, 3S Prime, 3X or 4A. The first is to go to the official page of the TWRP mode, that you can reach by heading to this link.
But TWRP recovery mode is also available on Play Store: use this link and click Install to get the app. To obtain root permissions on Xiaomi Redmi 3S, 3S Prime, 3X and 4A you have to unlock the bootloader first, install TWRP recovery mode and flash a custom ROM with root enabled. If you need more info about how to root your Xiaomi phone, you can read our guide explaining how to root Xiaomi phones.