iTunes won't recognize iPhone

killuminati

macrumors 68020
Original poster
Dec 6, 2004
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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

macrumors 65816
Dec 17, 2013
1,445
768
What IOS is on it and do you have the latest version of iTunes installed?
 

killuminati

macrumors 68020
Original poster
Dec 6, 2004
2,405
0
Yes, latest version of iTunes is installed. Phone came with iOS9 something and I upgraded it to 10. Wasn't working with either OS.
 

killuminati

macrumors 68020
Original poster
Dec 6, 2004
2,405
0
Yup, tried different cables, different USB ports.

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

bbrks

macrumors 65816
Dec 17, 2013
1,445
768
What about Antivirus software.....
Could be also a problem with your WIFI, so if you are connected that way, try restarting the router.
 

killuminati

macrumors 68020
Original poster
Dec 6, 2004
2,405
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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

macrumors 68020
Original poster
Dec 6, 2004
2,405
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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

macrumors 65816
Dec 17, 2013
1,445
768
You just need to update iTunes. The latest version is 12.5.1.21
 

killuminati

macrumors 68020
Original poster
Dec 6, 2004
2,405
0
Ah so I guess iOS10 is not compatible with OS10.7 then as iTunes only goes up to 12.2.2
 

bbrks

macrumors 65816
Dec 17, 2013
1,445
768
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...