How to Update Huawei Ascend G620S to Android 6.0 Marshmallow CM13.0 Custom ROM

The Huawei Ascend G620S Smartphone was well accepted by the the users though it was not that much high-end in specs, but it was well-occupied to fill the user’s needs as per the present day requirements. The Smartphone while by default was occupied with the Android 4.4 KitKat, now it can further be upgraded to the Android 6.0 Marshmallow, but via the unofficial Custom ROM. Since there is no hope of the handset receiving the official Marshmallow update, so if users of the Huawei Ascend G620S want, they can follow the below mentioned manual update procedure to install the unofficial Marshmallow Custom ROM on their devices.

The new Marshmallow Custom ROM has been introduced by recognized XDA Dev surdu_petru, and is named as Android 6.0 Marshmallow CM13.0 and is quite stable in nature. So you can use it for your everyday affairs without any issues. This new Custom ROM will bring a number of changes in your  Huawei Ascend G620S including the UI, Lock Screen, Customization and many other features. But because this is an unofficial ROM, so your device will void warranty post update. Also your handset might face issues like Dead SD card, bricked device or any other problems that are quite unfamiliar to you during the course of update, for which we at BlogZamana will not remain responsible.

NB: Before starting the update, you need to root your Huawei Ascend G620S and install the latest CWM Recovery in it. This is a must, else the update will be unsuccessful. Besides you must meet the below given requirements before starting the update.


  • One Huawei Ascend G620S Smartphone
  • Windows PC
  • Original USB Cable
  • Backup all your personal data such as SMS, MMS, videos, contacts, call logs, APN numbers, applications and other files since those might be erased.
  • Deactivate the antivirus or any other security protection from your PC for the time since that might create hindrance in the installation process.
  • Ensure that your device have at least 70% power back up before you initiate the installation process to avoid any sort of inconvenience during the installation.
  • Enable the USB debugging option in your Smartphone. To enable go to the Settings options. Forget not to disable USB Debugging post update.


Steps to Update

  • First of all download the above mentioned files and then connect your Huawei Ascend G620S to your PC via USB. Then move the files to the SD card in your device.
  • Then you have to move your device into recovery mode.
  • In Recovery mode select wipe data/factory reset, wipe cache partition and wipe dalvick cache options from recovery mode menu to wipe data and clear cache from your device.
  • Next you have to flash the update files on your Huawei Ascend G620S Smartphone. To do that click on the option Install zip from SD card and then select the .zip file that you moved to your storage in step 1. Then click Install and follow the screen instructions to flash the firmware in your device.
  • Follow the same procedure to install Gapps next.
  • Wait still the update finishes. Once finished, return to the main menu and click “Reboot System Now”. Your Smartphone will be rebooted into normal mode automatically once the update is finished.

Congratulations! Now you have finally installed the Android 6.0 Marshmallow CM 13.0 Custom ROM on your Huawei Ascend G620S. The process is quite easy and shouldn’t create any difficulties in the update process. Still you have any issues, inform me in the comment section. I shall try to find out a solution for you.

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