In iPod how can updates
WhyI can’t update my iPod ?
iPad Air 2, iOS 11
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Hello shahla723,
To update an iPad or iPhone the device must be connected to Wi-Fi and charging. I believe the battery must be at least 50% charged and have Low Power Mode turned off.
If all the above is true for you this article has steps to update using your computer. If you can't update or restore your iPhone, iPad, or iPod touch - Apple Support
I hope this is helpful,
- Scott (he, him)