@daniel
Hi,
I had imported iOS 6.1.6 in 3utools and carried it out iTunes flash on my 3GS iPhone. No other flash options,like Easy flash,Pro flash available in 3utools were working.After sucecessful iTunes flash, while configuretion of startup was on, ,there comes a pop up 'The simcard is damaged retry with another one". But the thing is that simcard is working normally in another phone.Even if I change the simcard with the one working, same message. Is it an indication that it is unable to deduct and read the simcard? May be simcard slot connector was damaged?Is it because of this when I tried to restore it in iTunes directly,it was saying 'There is a problem with your iPhone', at the end of the restore process?