Link thanks to wardcst
Manually install without root..
1. Download an place in external storage
2. Have your phone charged at least 70% (just in case)
3.Boot into stock recovery (turning off the phone and turning back on pressing at the same time volumes up and down , scroll to recovery and choose it pressing volume (up) ..
4.From there you should get the android abortion , press volumes up and down once more an it should look familiar from there wipe cache ( don't worry , your stuff won't erase) and install update from SD card ** it should take about 8 min an you are ready to go ** JELLY BEAN VERSION (4.1.2 ). enjoy.