Despite Samsung excluding Galaxy S2 phones from the official update to Android 6.0 Marshmallow, a custom ROM has just been released support for the device based on Google's latest OS version.
Samsung Galaxy S2 with model number I9100 can now be updated to Android 6.0.1 Marshmallow using the Mokee custom recovery. Mokee is known to have similar visuals to factory images. The custom ROM also offers to bring the Marshmallow experience of Galaxy S2 owners to a whole new level not mention it being fast, smooth and stable.
Before pushing with the download and installation of Mokee, a few reminders and prerequisites have to be considered first:
1. Make sure that Samsung Galaxy S2 has model number I9100. Using other variant may cause severe damage to phone. To know the model number of the phone, go to Settings > About device or About phone.
2. Root device here.
3. Install TWRP Recovery here.
4. Back up all necessary data here, including apps, SMS messages, contacts, call history, APN settings and more. Samsung KIES can also be used for backup.
5. Connect the device to any PC using a USB driver. Download a driver here.
6. Installing the any custom ROM induces risk of damaging device. Neither this site nor developers of the Mokee will be held responsible for such damage.
Here are a few steps to download and install Android 6.0.1 Mokee to Samsung Galaxy S2 I9100:
1. Down load Android 6.0.1 Mokee ROM here and GApps here for Samsung Galaxy S5 G900F on PC.
2. Connect phone to PC using the USB cable.
3. Copy then paste downloaded files to phone's memory or SD card.
4. Switch off phone and plug it out from the PC.
5. Go to Recovery Mode by press holding volume up, home and power buttons together.
6. Choose 'Wipe' to delete of data and 'Wipe Cache Partition'.
7. Go to main menu and choose 'Install zip from SD card.'
8. Select 'Choose zip from SD card.'
9. Repeat process for GApps.
10. Wait for the installation to complete.
11. When phone gets into any boot loops or other troubles, tap 'Wipe cache/dalvik' button.
12. Choose 'Reboot System'.
Check the phone's software version now.
