i have a galaxy s gt i9000. i rooted and updated it to xxjw4. everything was fine but the phn was not detected by pc via usb... not even by odin... but before installing xxjw4 it was finely detected... then i updated it to 2 different versions of jelly bean from external SD and so far those installed sucessfully but with some new problems... two of them were that the battery was not charging and that USB non detection problem... after the 1st reboot the the phn entered into a boot loop, even in recovery mode its a boot loop!... only downloding mode starts but not detected by pc or odin... please hepl 
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