Android One devices usually get updates pretty quickly — that's the whole premise of their existence after all. But if you're the kind of person who isn't fully convinced by the speed of OTA rollouts to your phone or even the stock flavor of Android that your device shipped with, you might want to tinker with custom ROMs or flash mods or try weird things with your phone. The safest way to do that is through a reliable custom recovery that also lets you back up your current ROM or setup and restore it should things go wrong.
TWRP is one of the most popular and reliable recoveries for Android, and it just became available for the second generation of Android One devices, whether they have a Qualcomm or a Mediatek chipset. This means that it's compatible with the MediaTek-running Lava Pixel V1, Infinix Hot 2 X510, Bq Aquaris A4.5, as well as the Snapdragon-boasting Cherry Mobile One G1, General Mobile 4G, General Mobile 5 Plus, and i-mobile IQ II.
You can find the corresponding TWRP pages for both categories of devices at the source links below, with download links and instructions. Happy flashing!