I tried using redsn0w to unlock my iphone but it kept crashing with my laptop so i got my Iphone 3gs unlocked by someone else, no idea which software they used but i know they used a PC and not a mac. To cut a long story short i was tired and without thinking switched off my iphone as my battery was getting low, either way if i didn't switch off the battery would have run out as i was no where near an electric point. No my phone stuck on the apple logo and no matter what i try i cannot get the phone to boot. I have been trying to do a tethered boot with Redsn0w but my laptop does not recognise my iphone, nor does redsn0w, itunes etc. I have tried everything to get it into dfu mode or even just to switch it off. Power button 3 secs, both buttons 10 secs, home button ten secs. Both buttons itunes 10 secs Plug usb into itunes while holding the home button Tinyumbrella will not recognise and i do have shsh saved 6.15 basband 4.2.1 itunes 10.1.1 Apart from apple logo showing the screen does go blank for a second approx once every 5-10 mins. Any ideas????