If you are using the Xiaomi Redmi 1S handset you might have got the notification for the new update the MIUI JHCMIBL56.0 Fastboot (Stable). This is an OTA (Over the Air) update of size 528MB. If you have not yet received the notification you can manually try checking for the software update from settings, about, software update.
This update fixes some issues with the camera app – when viewing images the back button did not work, this back button issue has now been fixed. There are other bugs fixed plus OS optimized. Fast boot is supported.
This looks like a bug fix / performance enhancement update.
Your data will be intact, there is no need to take a backup, however always a good practice to keep a backup, just in case. Also make sure that the battery level is at the highest whenever you are updating the OS, preferably over 50% and better still keep it at over 75%.
If you are using the Redmi 1S and have updated do leave your feedback in the comment section below.
Tip: Kundan Singh.