……at least for me and one guy. I don't understand, how and why it works, but i tried paste this command from linux terminal:
find /efs/|while read s; do chown radio:system $s; done;
find /modemfs/|while read s; do chown radio:system $s; done;
chmod -R 777 /efs/
chmod -R 777 /modemfs/
But without previous backup and restore modemfs and efs, just aplied on prerooted XXAMB6 stock ROM current installed on my device. After reboot i went to CWM, wipe data, dalvik, cache and flash latest Vanir ROM. After boot ROM works perfectly. First time i thought, that problem was in older versions of Vanir, but one owner of xcover 2 send me message, that same latest ROM no works on his device after flashing. After application of commands work.