Installing TWRP custom recovery replacing the currently available stock MIUI recovery on your phone is just a step closer to getting root. Some users feel it difficult to flash TWRP on an MIUI phone. Thankfully, someone known as Feds64 has managed to develop a ready-to-use toolkit to painlessly flash TWRP 3.0.0 for Redmi 3S, Redmi 3X, and Redmi 3 Prime (codename Land). However, since TWRP is a very specific software and spec-defendant, therefore this toolkit is only for Redmi 3 with codename Land and is not for IDO. Moreover, your phone bootloader should have already been unlocked officially in order to flash TWRP. On top of that, this tool also allows you to revert back to MIUI official stock recovery in case you are getting bored with TWRP.
Some known key features: Support for REDMI 3S/Prime/3X, Flash TWRP 3.0.0, Flash Stock ROM Recovery Image, Device OEM Info
ROOT only, and Hassle-free flashing process.
Also read: TWRP Flasher Tool for Redmi Note 4.