Error 1600 can't upgrade to iOS 5

anonymous12

macrumors member
Original poster
Apr 22, 2011
50
0
I attempted to update my jailbroken iphone 4 and I keep getting error 1600. Is there anyway to fix this?
 

anonymous12

macrumors member
Original poster
Apr 22, 2011
50
0
When my iphone 4 is switched on normally I get error 21. WHen it is in DFU mode I get error 1600. And btw how do I know if my iphone is CDMA or GSM?
 

GraphicsGeek

macrumors 6502a
Sep 19, 2008
533
0
Im not familiar with that carrier seeing as its not in the US. Im assuming its GSM, just because CDMA is pretty rare outside of the US. The easiest way to tell is if you have a SIM card slot on the side. If so, then yes, you more than likely have GSM.
 

anonymous12

macrumors member
Original poster
Apr 22, 2011
50
0
Ok the update finally worked! If i choose to restore my iphone as a new one, can I still restore from backup afterwards?
 

Cap41

macrumors 6502
Nov 19, 2008
311
0
Error 1600 is fixed by editing the host file. You will have to google how to fix. its easy. Basically when you jailbreak you have pointed iTunes towards cydia to sign the FW instead of apple. When you restore your host file is still pointed at cydia. Therefor its not signing the correct FW. you need to remove the line gs.apple.com remove it or rename it. Then it will restore.