There are two possibilities:
1, this serial number has been used,
2, not the serial number of the Apple version.
What should we do when we connect an iPhone to a computer and iTunes doesn't show the iPhone's serial number, instead saying \"Not applicable\" next to it?
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operational approach
1, how the phone serial number does not apply, then you can only download the firmware for recovery, click on the back of the recovery iPhone option, iPhone will automatically download the firmware in line with this iPhone.
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2, after selecting the downloaded firmware, iTunes will start brushing the machine.
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3. After the phone is swiped, open the iPhone for setting.
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4, after the setting is completed, open the main interface, and then connect to iTunes, it will be a normal iPhone interface, and there will be no serial number does not apply.
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