Download M315FXXU2BUF1: Galaxy M31 June 2021 Security Patch

In this article, we have shared the June 2021 security patch update for Galaxy M31 with build number M315FXXU2BUF1. The update is based on Android 11 and brings no major changes except security patches and bug fixes. This update is now live in the European region.

The update is now live in India and Vietnam and soon be rolling to other regions around the globe. It is rolling via OTA (Over the air) in a phase-wise manner. If you have a Galaxy M31 with variant SM-M315F, then you may receive the notification to upgrade your security patch to June 2021 with build number M315FXXU2BUF1.

Download M315FXXU2BUF1: Galaxy M31 June 2021 Security Patch

Check Software Update on Galaxy M31:

If you have not received the notification to upgrade your firmware to M315FXXU2BUF1, then check for the OTA update manually by going into Settings –> System > System Updates. In case if you see any new updates, you can hit the download now button to start upgrading your device.

Before upgrading, make sure you have enough juice (battery backup) on your Galaxy M31 and connected to a good WiFi network. If there is no new update, then follow this guide to manually install the firmware on your Galaxy M31.

Firmware Info:

  • Device Name: Samsung Galaxy M31 (SM-M315F)
  • Build Number: M315FXXU2BUF1
  • Android OS Version: Android 11
  • Software Supported: ODIN Tool
  • Android Security Patch Level: 2021-06-01 

How to Install Galaxy M31 June 2021 Security Patch

Before jumping into the firmware flashing process, ensure to check out the requirements, and download links. You’ll require to download the ODIN flash tool, firmware flash file, and drivers on your computer. Let’s take a look.


  • This stock firmware (M315FXXU2BUF1) is only applicable for the Samsung Galaxy M31 model.
  • Keep your device charged up to 50% to avoid occasional shut down during the firmware flashing process.
  • A Windows PC/Laptop and a USB Data Cable will require.
  • Make sure to a full data backup before flashing the software on your device.


GetDroidTips will not be responsible for any kind of hardware or software damage to your device while or after you follow this guide. Do the manual flashing process at your own risk. Taking a full data backup is always recommended.

Download Links:

Firmware Installation Guide:

  1. First, download all the necessary files on your PC including the ODIN Flash Tool.
  2. Install and launch the ODIN flash tool > Select the Galaxy M31 stock firmware file according to your region to flash it.
  3. You can check out the full depth firmware flashing guide here: How to Install Samsung Stock Firmware Using Odin Flash Tool
  4. For better visualization support, you can also check out our full-depth video tutorial.

That’s it, guys. We hope you’ve now successfully installed the latest June 2021 security patch (M315FXXU2BUF1) on your Samsung Galaxy M31 device. Have some queries? Let us know in the comment section below.

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