My wife´s iPhone begun restarting forever, sometimes it shows a green screen and sometimes a blue screen appears. Sometimes it fully initiates but suddenly it reboots...

The log is here:

pastebin - iphone4 reboots forever - post number 2296227

Regards...

I looked through the log but I don't actually see the reboot event in the log. Do you have a log that shows the phone's failure immediately prior to reboot?

Without it, the only guess would be that something has corrupted your iOS installation, and a solution should be to put the phone into DFU mode, run TinyUmbrella, and restore to iOS 5.1.1 (assuming you have an SHSH saved for 5.1.1), unless you don't care about jailbreaking/unlocking, in which case you can restore to iOS 6.0.1 directly through iTunes without running TinyUmbrella as the TSS server. Depending on how recently the phone has been backed up, you may not lose much data at all.