So after 2 weeks with 5.1.1. here are my conclusions, comparing to 4.4.4:
- the battery life has decreased with at least 30%;
- the GPS is not working properly;
- some minor problems with the wifi;
- there is no way to install xposed framework...
PRA-LX1 is single band, you can connect only to 2.4Ghz WiFi.
Thank you for your answer!
I have installed this version and none of the bugs from the original 5.1.1. are present anymore.
Plus, the rom is very lite, so the phone is very fast.
Love it! Thanks guys for making this version!
I have a good kernel found. You can to download here. The description and the download can be found at the link.
The kernel resolves the zram, GPS and battery problem at once.
See side by side comparison....
I don't think E4 has better back camera or better display...
Also, no 4G, no NFC... Take a closer look to the specs here