It's an issue with the TSS server. It gives the following output:
Sending TSS request attempt 1... TSS server returned: <html>
<head><title>403 Forbidden</title></head>
<body bgcolor="white">
<center><h1>403 Forbidden</h1></center>
<hr><center>Shield</center>
</body>
</html>
Basically, it's on Apple's side. It's NOT an issue with your devices. Just wait a little while for them to fix it.
It's an issue with the TSS server. It gives the following output:
Sending TSS request attempt 1... TSS server returned: <html>
<head><title>403 Forbidden</title></head>
<body bgcolor="white">
<center><h1>403 Forbidden</h1></center>
<hr><center>Shield</center>
</body>
</html>
Basically, it's on Apple's side. It's NOT an issue with your devices. Just wait a little while for them to fix it.
You have to turn off "Find My iPad/iPhone" first, then go through the steps of connecting to iTunes and update/restore. You can turn off "find my [device]" by logging in to the apple website from your computer.
Yesterday I had this issue trying to update my brothers iPad, looked online and called apple no help, then today I had to tranfer a file to Android tablet and noticed when I plugged it in it gave a low power USB message, plugged iPad (that was already in DFU mode, so google if you don't know how) into back port on my desktop and restored fine. Hope this helps others.
Use an apple laptop to restore/update with Itunes....something wrong with Windows 10 and Itunes to take care of error 3503. I tried on 4 PC's with Windows to no avail...worked to restore the first time with the apple laptop.
I was dealing with the same issue and since I am in urgent need of my ipad I was able to download this software (http://www.iphone-ipad-recovery.com/recover-ipad-data-and-get-out-of-recovery-mo de.html). Once downloaded on my PC, I chose the option to restore from recovery mode/black screen and my ipad wasnt recognized immediately, but upon a second try my ipad came out of recovery mode and I was happy to see my lock screen and no deleted apps! I hope I was able to help someone 🙂
iPad mini is disabled
- iTunes 12.7
- PC-Win 7, itunes error: 3503
- restart PC and iPad
- iPad in recovery mode > same itunes error
Work around
- create a new admin test user then put the iPad in recovery mode
- itunes start downloading the iOS software
-You can try on another computer
I too got the error 3503 trying to update my iPad when connected to a Windows system. After reading the 4 pages of the thread, I tried running the update from a different computer (a Macbook Air with Sierra 10.12.4 and iTunes 12.7.0.166) as was suggested in one of the posts and while it seemed to go rather slowly, it did work! My iPad is now functioning again! Good luck everyone!
I solved the issue without dodgy 3rd party tools mate. I bought a used iPhone 6, but couldn't restore from iTunes back up, due to not have IOS 11. I couldn't update to IOS 11 via iTunes/Windows 10 due to error 3503. I tried DFU mode with no avail. I held down the Home and Sleep buttons to get out of DFU mode and went to Settings /General/Software Update and successfully updated without connecting my iphone to the PC without the lightning cable. This enabled me to reconnect to iTunes and restore from back up.
Hope that helps some of you 😀
To answer my own question: i didint work with windows computer, but borrowed apple mac book pro and apparently it worked without any problems. So there you go, the solution is to update an iohone on apple software based computers
I solved this by using reiboot to get out of recovery mode, and I couldn't update with itunes because of some corrupt files. But I found a program called 3utools and reflashed it with the latest update.
SOLUTION---------
I had this problem all day yesterday. Spent several hours speaking with Apple and tried to restore from iTunes on 3 different Windows PC's with no luck.
Today, I asked a co-worker to use their Mac, signed into my iTunes account, performed a restore from a previous backup and now it is working!!! Try using a Mac and see if it works for you!
No clue what the problem itself it, but i had the same problem when updating my iPad from iTunes on my PC. I then tried updating from my MacBook and it worked and fixed the problem. Looks like it may be an issue with iTunes on PCs/Windows?
Another guy suggested using a program to take your ipod, iphone, ipad out of recovery mode, have attempted this on all 3 types of devices and has worked each time. http://www.iphone-ipad-recovery.com/downloads/ios-system-recovery.exe
Use windows link, download, install, go to device tab at bottom and press the first option on the screen to take your device out of recovery mode to make it usable until apple fixes the update error 3503.
Like others have said, using a Mac instead of Windows PC works. I was lucky and was able to use a friends Mac to get my Ipad restored quickly. If you don't have access to a Mac you could go to an Apple store.
I got it working
Use 3UTOOLS, download & install it, then conenct your phone to your PC and go to the flash tab, download the desired iOS version or import it and click flash, thats it.
Just successfully downgraded from ios 11 to 10.3.3
any idea what error 3503 is?
