PSA: Have trouble updating your iPhone? Your smart battery case might be the problem.
**TLDR**: If you are having trouble updating your iPhone and you have a smart case attached, try taking the case off.
So I tried to update my iPhone 10s Max to iOS 12.2 this morning, through iTunes on my Macbook Pro, and the update failed at the “verifying update with apple” step. I then get a window in iTunes saying that there is a problem with the iPhone that requires it to be updated or restored. I notice my phone is now permanently on with the connect to iTunes logo.
At this point I try to update the phone again and it fails, showing me [Error (9)](https://support.apple.com/en-us/HT201444) in iTunes. I then tried to troubleshoot by restarting my phone, updating my laptop, and even changing to a different usb port, all ending in the same error message. Now seeing no other option but to restore the phone I try that option, but it also ends in the same error.
On a hunch I think to myself what if the smart case is making some sort of interference. I take the case off and attempt the update again, which works as intended.