When running iTunes and you receive the popup message:
"iTunes cannot read the contents of the iPhone. Go to the summary tab in iPhone preferences and click restore to restore this iPhone to factory settings”.
DO NOT RESTORE
- It could be one of two (or both) files are corrupt on your iPhone (or other iDevice), they are iTunesDB and iTunesCDB.
- There is an fast fix for this, even if your iDevice is non jailbroken.
- You want to disconnect your iDevice from your computer and close iTunes to ensure you DO NOT RESTORE.
- Download iFunBox or iTools a Free Tool for accessing the iDevice file system. It has both a OSX version and Windows version for download.
- After you download the version of iFunBox or iTools for your OS, you will need to install it and run it.
- After installing and running iFunBox or iTools, connect your iDevice to your computer.
- You will see a message in the Upper Right of iFunBox “connecting to iDevice“, after iFunbox has connected to your iDevice, click on the tab “iFunbox Classic“.
- On the left panel, expand “Raw File System” (click on the +), then expand “iTunes_Control“, then click on “iTunes“.
- In the right panel you will see a number of files, right-click on the file “iTunesCDB” and select rename, please add X after the iTunesCDB in the file name, this will allow you keep the file in case you need it again (you should never need it, but better to be careful than sorry.)
- After you have renamed the file, click on your iDevice name on the upper right of iFunBox and select “Device Safe Removal“, this will ensure the file name change will be written back to your iDevice.
- After you see your iDevice is closed (“No device connected” will be displayed in the upper right), you should now close iFunBox
Now run Apple iTunes, it will see your iDevice and you will be able to Sync again.