looool this topic is a lot of fun... serious this guy doesnt know how to handle an android phone... doesnt know how to use a pc and insulted everyone that try to help... if someone knows what is saying is KonstaT and you send him to f#ck him self???? lol what a boring child... sorry KonstaT but my solucion is the best. buy a windows phone and have fun using windows7 or xp or wtf you use... if you have money buy a Mac and a Iphone (please forget about jailbreack) ... for 10 euros i can sell you a Nokia 3310 (its unbreakable) very good for you and you can call your imaginary cousin all the time...
you dont have a one click solution... someone already tell you what to do! Use a Linux OS, install antroid-tools (ADB and Fastboot) flash the recovery, put a rom in the SD and install it... thats it... dont like Linux? dont use Android, buy a windows phone.
1 - when i conect bluetooth to the car audio it gets reversed. the radio controls the phone tracks and the sound is played by the phone (your 4.1.2 is working ok)
2 - i have random reboots too... (i notice that if i desable any task manager apps the reboots stops
3 - when conect to laptop over usb the touchscreen it gets strange reaction to touch... like if i touch every options at the same time (strange)
Hope this helps you making it better
keep the amazing work