Jailbroken 3G not booting after reset
I have just got into work & had to restart my iPhone 3G so that I could receive data over 3G (as usual occurance for me after receiving a phone call). Normally the phone will just reboot as per usual & I won't have a problem.
However, on this occasion the phone won't reboot at all. The Apple logo will briefly flash up & then the screen will go blank.
As I am at work & don't have access to iTunes (so I can reboot in Recover/Safe mode), are there any siggestion of what i can do at all? Also, would like to avoid having to recover via iTunes anyway, as want to avoid re-jailbreaking & re-downloading/installing apps etc.
Any suggestions?! Thanks for any help in advance.