iTunes won't recognize iPhone

[killuminati]

I bought a used iPhone 6 and I can't get it to connect to iTunes. When I plug it in I get the error message "iTunes could not connect to the iPhone “iPhone” because an invalid response was received from the device."

I tried booting the phone in recovery mode and doing a restore but when I try that I get the error message "This device isn’t eligible for the requested build". I've tried following articles online but so far nothing has worked.

Any ideas?

 

[bbrks]

What IOS is on it and do you have the latest version of iTunes installed?

 

[killuminati]

Yes, latest version of iTunes is installed. Phone came with iOS9 something and I upgraded it to 10. Wasn't working with either OS.

 

[bbrks]

Tried different cable, USB port?

 

[killuminati]

Yup, tried different cables, different USB ports.

Another interesting thing is that this is the 2nd iPhone 6 this is happening with.

 

[bbrks]

What about Antivirus software.....
Could be also a problem with your WIFI, so if you are connected that way, try restarting the router.

 

[killuminati]

No antivirus software.

Also I just realized I don't have the most recent itunes release. My version is 12.2.2 and maybe there's no further release as I'm still using OS 10.7.5

 

[killuminati]

I downloaded the firmware for 9.3.5 and used recovery mode to install that. It now works fine and connects to the computer no problem. HOWEVER if I update to iOS10 then it no longer works. And I need to update to iOS10 because my backup is from iOS10 and won't work with iOS9.

Any ideas??

 

[bbrks]

You just need to update iTunes. The latest version is 12.5.1.21

 

[killuminati]

Ah so I guess iOS10 is not compatible with OS10.7 then as iTunes only goes up to 12.2.2

 

[bbrks]

It shouldn't work like that......you did check iTunes for update?
I don't own a MAC, but all I know is, whatever Windows version I had, iTunes was always updating to the latest version...