My iPhone 3GS gives error 1603 when updating/restoring
I use iphone 3GS...I have been using the ios 4.3.3 all this while. Now, the other day I tried to update to ios 5.0.1 and it gives the itunes error 1603. I have tried every possible suggestion I could get from the forum and apple help site but seems like I can't by pass the error. I finally passed the iphone to the telco, they even failed to update or restore my iphone. Please help me. Tell me what to do!
macbook pro 13'inch, Mac OS X (10.6.5), Iphone 3GS white, iPad 16GB, Fujitsu lifebook