This Device Isn’t Eligible For The Requested Build

My iPhone 3Gs (which i got 2 years ago) has been basically shutting down around 5 minutes into every single call but other than that works fine. I am not a big phone person but use the phone for emails and calendar etc etc but it has just got on my nerves more and more lately. Anyway, I decided to bite the bullet and reset it to its factory settings after doing a back up and then I was informed by itunes that tmy phone was not eligible for the upgrade which was not the case. After a lot of searching I found a quick and easy solution and I think it may be something that is happening to a lot of people so here is a link to a youtube video…[lockfmlocker] from  of how to fix the problem. It saved me a lot of time and misery.[/lockfmlocker]