To narrow down exactly what you need for this specific device, let me know: Do you have already installed?
Extends the usability of the Galaxy S2 with highly optimized CPU governors to manage the older hardware. 3. SlimLP (Android 5.1.1)
: These are the most stable builds for Android 5.1.1 on this hardware. Reliable mirrors can often be found on XDA Developers or archived ROM repositories. GApps (Google Apps) gti9100 firmware 511 download upd
While CM12.1 is a solid choice, other developers created ROMs that offered different features and customizations. These ROMs are all based on Android 5.1.1 and follow a similar installation process.
: Move the downloaded ROM and GApps ZIP files to your phone's internal storage or SD card. Boot to Recovery : Power off, then hold Volume Up + Home + Power until the recovery screen appears. To narrow down exactly what you need for
Installing new firmware wipes everything. Use apps like Titanium Backup to backup your data.
One of the biggest challenges when installing newer Android versions on the Galaxy S2 is its small system partition. You may encounter an Error Code: 70 when trying to flash GApps, indicating there isn't enough space. SlimLP (Android 5
If you are looking for stock firmware for recovery purposes, use the Samsung Firmware Database on SamMobile or IMEI.info to find the original 4.1.2 files for the GT-I9100.
: Google Apps package for Android 5.1.1 (required for the Play Store).