The latest ColorOS 5.2.1 update for Realme UI brings fingerprint shooting for camera, improved HDR for front camera, January 2019 Google security patch, and more. Check the full update log given below. The January update for Realme U1 comes with build number RMX1831_11_A.05 and available for download on Realme website, if you prefer manual installation.

The ColorOS 5.2.1 OTA update, build RMX1831_11_A.05 for Realme U1 starts rolling out and since it is a staged roll out, it will take a couple of days to complete. If you cannot wait for the OTA, you can download the full OTA update from the link below and flash manually.


Download and install January 2019 update on Realme-U1

Realme UI January update log (build RMX1831_11_A.05):


  • Added Fingerprint Shooting for camera
  • New camera watermark
  • Improved quality for camera


  • Added reboot function
  • Optimized reminders when Developer Options, Accessibility Mode and Device Manager on


  • Android Security Patch Level: January 5, 2019

How to Download Realme U1 January Update

The good news is that Realme opened a software download section for all of its devices, so you can download and flash the firmware manually. In addition, Realme now allows unlocking the bootloader of its devices, so you can install custom ROMs as well.

If you would like to install the new software update manually on your Realme U1 without waiting for the OTA (over the air) update, then download it from below link.

Download Realme U1 Full OTA Update (RMX1831_11_A.05) [HERE] or [HERE]

Related: How to unlock Realme 2 Pro Bootloader

How to install January update on Realme U1 manually

1. Copy the downloaded OTA update zip file to the root directory of your phone.

2. Turn off your phone. Press and hold the Volume Down + Power buttons simultaneously until booting into Recovery mode.

3. In Recovery, select language > From phone storage > Select the ColouOS OTA package > tap OK to install the OTA.

4. Once the installation completes, tap Reboot to boot your phone into new ColorOS version.

Realme U1 is the latest Android smartphone from the former sub-brand of Realme. It is one of the beautifully designed, affordable and feature packed smartphones. Runs on the ColorOS 5.2 (Android 8.1 Oreo), the handset features a 25MP AI camera for Selfie, dual (13MP+2MP) camera for back, Mediatek Helio P70 processor, 64GB/32GB storage, 4GB/3GB RAM, 3500 mAh battery and more. (Source – Realme)

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Kannan is a computer and Android enthusiast, a blogger by passion and a tech freak. His always ready-to-help attitude, knowledge and hard work is what drives him.