Guide: Downgrade Android 7.0 Nougat to Android 6.0 Marshmallow without losing data

Are you trying to downgrade your Android phone or tablet from Android 7.0 Nougat to Android 6.0 Marshmallow? Do you have no idea how to roll back Android 7.0 to 6.0 on your device? Want to avoid data loss? Don't panic! In this article, we'll provide you with an effective method and a detailed guide to help you easily downgrade Android 7.0 to Android 6.0 Marshmallow without losing any data. Just follow the steps below to start downgrading your Android phone and immediately install the desired Android OS:

Step 1: First backup all your Android data to the computer or extract it from there

To avoid any unexpected data loss issues while downgrading from Android 7.0, it is highly recommended that all Android users back up important data on their devices first.

If you have backup software or a cloud account, you can choose to back up your necessary data and files to the cloud or to your PC. It is not recommended that you back up your data on the phone because you're downgrading the Android system, which might lead to severe data loss issues. Here we recommend that you try an Android backup alternative tool – Mobisaver for Android, which supports all users to safely back up and export all Android data to a PC in three simple steps.

Now you can download the software for free and activate it, then follow the steps below to backup and extract data from your Android phone:
1. Connect your Android phone to the computer
Install and run the MobiSaver for Android tool, then connect your phone to the computer using a USB cable.
Click the "Start" button to allow the software to read and connect to your device.
Notice: Since the software requires access to a rooted Android device, please ensure your phone is rooted before attempting to recover data.

Before downgrading to Android 7.0, back up your Android data first.

2. Scan Your Android Device for Lost Data
Once your Android device is connected, the software will immediately scan your device for all existing and deleted data, including any missing data.

3. Preview and Recover Android Data
You can preview all the recoverable files one by one, and then select the ones you want to back up and extract quickly.
Finally, click the “Recover” button to save the selected files and data to a secure location on your computer.

Step 2: Downgrade from Android 7.0 Nougat to Android 6.0 Marshmallow

Now, you can easily downgrade from Android 7.0 Nougat to Android 6.0 Marshmallow with the help of this detailed guide given below.

Important: Before downgrading Android, make sure to back up important data, since this process can remove all data from your Android phone or tablet.

1. Download and install the Android SDK Tools;

1. Download and install the Android SDK Tools from the Google Developers website. 2. Install it to C:\android-sdk, then launch it after installation through the Start Menu. 3. Open the SDK Manager, deselect everything except for the Android SDK Platform Tools and the Google USB Driver. 4. Click on Install 2 packages, check the box for Accept licenses, and then click on Install.

2. Download the official Android 6.0 Marshmallow image

You can now download the official Android 6.0 Marshmallow factory images straight from Google's Android Developer website. Or, you can click the appropriate link below to head straight to the download for your device:

Download the Android M Preview system image

3. Unzip the downloaded Android M factory image

All firmware image files that you download are compressed and need to be decompressed first.

4. Enable USB debugging and connect your Android device to your computer.
5. Flash the Android 6.0 Marshmallow factory image, and then uninstall Android 7.0 Nougat.

1. Open the Command Prompt and type: `cd android-sdk\platform-tools`, then press Enter; 2. Type: `adb reboot bootloader`, then press Enter; 3. Input: `fastboot oem unlock` to unlock your Android device. (This step will erase all data on your phone, so make sure to back up or extract your Android data beforehand); 4. Type: `flash-all` to install the bootloader, baseband firmware, and the operating system - Marshmallow.

Be patient – this process may take a few minutes, so don't turn off your device. When it's done, your Android will reboot, and you'll have successfully downgraded from Nougat 7.0 to Marshmallow 6.0.

Note: If you lost some data after downgrading from Android 7.0 or uninstalling Android 7.0, don't worry. You can try using the tool MobiSaver for Android to recover all your lost data.