I have been having shitload of troubles on my iPad air. Havent found answer how to solve for past six months.
-wifi not connecting
-battery issues
-samba not connecting
-strange reboots
-apps dissapearing
-flash mem getting full (128 gb) on its own
-and the list would go on

Was running ios 7.0.4. Now updated to 7.2.1. All ok now. Just wanted to share if anyone has similar issues as iOS 8 coming out and last days to upgrade.

Just a helpfull hint fi anyone in need. And yes, jailbroken, pangu worked ok. iTunes install took 3 days. JB only minutes. Maybe itunes doesent like linux/virtual enviroment.