I'VE BEEN HAVING PROBLEMS AFTER I UPGRADE MY IPHONE4 TO THE NEW IOS 5 EVERYTIME I CONNECT MY IPHONE TO THE RADIO IT WILL DETECT AND PLAY FOR ABOUT 2-3 MINUTES THEN RADIO WILL REBOOT BY IT SELF CURRENTLY I'M USING THE APP FROM CYDIA RESUPPORTED 4.0+ BUT IT STILL DOING THE SAME THING. IT WAS WORKING PERFECTLY WHEN I WAS UNDER 4.3.5 IOS WITH RESUPPORTED. DOES ANYONE HAVE COME ACROSS THIS ISSUE OR DOES ANYONE KNOW HOW TO FIX THIS

first off, i think your keyboard may be broken.. you may want to get that caps-lock key checked out...

second, what version of os/app is your f900bt..

many users have 5.0.1 ios working with audio on latest 3.x fw, however the one known issue is that if you attempt to switch to ipod video mode with ios 5.x the HU will reboot... No fix known for this.. maybe something that your cydia jailbroken app is doing?

Ditch the iPhone