Invalid response when backing up 6S


macrumors newbie
Original poster
Mar 22, 2017
When trying to backup my S6 to the laptop I get the following message " I Tunes could not connect to I phone PSteen because an invalid response was received from the device". Please give advise how to rectify too be able to backup.


macrumors G3
May 16, 2015
Here are a few tricks I use during backup.

Keep your phone on home screen at all times. This could sometimes be the best way to ensure a successful iTunes backup.

Unplug and plug your devices. Some "invalid responses" are from loosen connections.

Restart or hard reset your device once or twice. This could also help.

Change another cable or another USB port, or both.
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May 3, 2011
Make sure you are using the latest version of iTunes.
There should be no reason to update iTunes just to backup the device if iTunes is already installed.

I always keep a back up copy of the iTunes that was installed in case a reinstall is needed.

But putting a later version of iTunes on top of an older version (esp. if the Windows version has changed) can bring it own share of headaches.

Happened to my sister...I had to fix (and it involved a little work).
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