upgrade Android mobile version to marshmallow, naught, oreo ,cyanogen model

How to Upgrade Android Mobile Version Using Custom ROM (CWRP):

Requirements:

- Ensure your mobile phone is rooted.

- Install TWRP (Team Win Recovery Project) custom recovery.

- Download the custom ROM suitable for your mobile model.

Procedure:

Step 1:

 Root Your Mobile Phone

1. Root your mobile phone using a suitable rooting method.

Step 2:

 Install TWRP Custom Recovery

1. Download and install TWRP custom recovery on your mobile phone.

Step 3:

 Download Custom ROM

1. Download the custom ROM for your specific mobile model. Ensure it is compatible with the TWRP recovery.

Step 4:

 Access TWRP Mode

1. Switch off your mobile phone.

2. Press and hold the Volume Up + Power button until the TWRP mode is displayed.

Step 5:

 Take Mobile Backup and Install Custom ROM

1. In TWRP mode, click on "Install."

2. Select the downloaded custom ROM.

3. Slide to flash, and the installation process will take approximately two minutes.

Step 6:

 Clear Dalvik and Cache

1. After installing the custom ROM, go back to the main menu in TWRP.

2. Click on "Wipe."

3. Swipe to clear Dalvik and Cache.

Step 7:

 Reboot Mobile

1. Reboot your mobile phone.

By following these steps, you can successfully upgrade your Android mobile version to Marshmallow, Nougat, Oreo, or CyanogenMod using a custom ROM and TWRP custom recovery.