Only if you backed up, but other then that it's impossible.
If you unlock the bootloader via S-OFF you won't lose anything on the other hand.
HTC One - Sense 5.5, Android 4.4.2, Stock Kernel - Active
Google Nexus 10 - Android 4.4.2, Stock Kernel - Active
Sony Ericsson Xperia PLAY - XPlayStation V15
, Android 4.0.4, DooMKernel ICS v03
- Handed Down