![]() ![]() From recovery menu, select install zip from sdcard followed by choose zip from sdcard. Locate the CM12.1 Android 5.1 Lollipop custom firmware and confirm the flashing process.Wipe data task: from CWM recovery menu, select wipe data / factory reset and confirm the process.Perform a Nandroid backup of your current OS: Backup > backup and restore on ClockworkMod recovery.Boot it into recovery mode: switch the phone on while pressing and holding Volume Up + Home + Power buttons simultaneously.Disconnect the USB cord and power off your Galaxy S4.Connect your Galaxy S4 to your computer using a USB cable and copy the zip file to your phone’s SD card.Required files: download the CM12.1 Android 5.1 Lollipop custom firmware for Galaxy S4 from here and save it on your computer. How to update Galaxy S4 i9505 to Android 5.1 Lollipop:
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