Most of the time, you simply enjoy using your iPhone. That enjoyment is not always so high, especially when you try to update your device, and all of a sudden, you see one of many possible errors, like error 1604 is. We know how frustrating that is, which is why we prepared 5 ways to fix iPhone error 1604 for you. Try all these solutions, and you will hopefully find the one that works out for you. If not, make sure to call Apple, and get further assistance from them.
See also: 5 Ways To Fix IPhone Error 4014
5 ways to fix iPhone error 1604
Solution No.1: Restart iTunes.
Since this is the easiest way of all 5 ways to fix iPhone error 1604, we will start with it. Simply turn off your iTunes, and unplug your device from your computer. Wait for several seconds, and connect the iPhone to your computer, and turn on iTunes.
Solution No.2: Update iTunes.
Check if you have the latest version of iTunes. For both users, Windows or Mac, open the software, and find Check for Update. If there are updates available, download and install them.
Solution No.3: Change the USB cable you are using.
In many cases, the reason why you see this error is because your USB cable is damaged. If you use third party cable, change it, and use the one you got with your phone.
Solution No.4: Change the USB port.
Change the USB port you are using. Make sure to plug the cable of your device directly to your computer. If there are some other devices, unplugged them, and leave only the necessary ones.
Solution No.5: Update or turn off your antivirus software.
Maybe your antivirus is causing this error. First, update the software if possible. If that does not help you out, before you continue with the update, turn off antivirus software completely.