Though the Samsung Milky Way S2 is ane of the oldest Samsung android devices nevertheless available, it continues to receiving every unmarried afterwards evolution inwards the android OS. This signifies ane thing; that the Samsung Milky Way S2 volition non e forgotten anytime shortly and, developers' involvement inwards the device continues to grow.
For the fore mentioned reasons, a developer has created a CyanogenMod thirteen which is android 6.0 Marshmallow ROM for the Samsung Milky Way S2 GT-I9100 based on official CM sources.
If you lot convey the Samsung Milky Way S2 inwards your possession, this is a practiced tidings for you. You tin instantly flash the official CM thirteen android 6.0 Marshmallow on your Samsung Milky Way S2. Meanwhile, it should hold upward noted that you lot need custom recovery flashed on your Samsung Milky Way S2 earlier you lot could flash whatever custom ROM on it including the Google Gapps for CM thirteen android 6.0 Marshmallow.
See here: How to Flash Custom Recovery On Samsung Android Devices
HOW TO INSTALL CM thirteen ANDROID 6.0 ON SAMSUNG GALAXY S2 I9100
1. Download CyanogenMod thirteen for Milky Way S2 from here.
2. Download Android 6.0 Marshmallow Google Apps from here.
3 Move both files (CM13 for the S2 too the GApps) you lot convey downloaded to the beginning of your Milky Way S2 internal storage.
4. Turn the band off. Press the book up, habitation too ability buttons at the same fourth dimension for approximately minutes. This volition kicking the band to recovery.
5. From there, perform a mill reset to wipe information too delete cache.
6. Then flash the ROM starting fourth dimension too and thus Google Apps past times tapping or selecting "Install ZIP from SD Card".
7. Once you lot convey successfully flashed both files, reboot the band to run across CM13 android 6.0 inwards activity on your SAMSUNG GALAXY S2.
It is strongly recommended that you lot create a consummate backup of your ROM earlier you lot proceed amongst the instructions above. Also, backup upward your SMS, backup your contacts too other necessary documents earlier you lot proceed.