Roughly a month ago Elephone announced that they are working on a beta version of the famous CyanogenMod 13 for their P9000 model. And seems like that with the help of a russian developers they have successfuly overcome the obstacles like the problem with network connection and the beta version is out not just for the P9000, but also for the P9000 Lite.
Most of the bugs in the beta are already solved and fixed, but not everything and the version still struggles with tethering, GPS accuracy and memory optimizations. But they are still working on that so hopefully soon everything will be ironed out fully.
If you would still be interested to install the CM13 beta nonetheless you can download it here for the Elephone P9000 and here for the Elephone P9000 Lite. Your participation would surely help them in discovering new bugs and providing feedback.