need to update ios 6 to ios 10 on an ipod touch.

The 4th generation iPod Touch cannot be upgraded beyond iOS 6.1.6 and the 5th generation cannot go beyond iOS 9.3.5.

If you are unsure of which model you have, see: Identify your iPod model - Apple Support

You can't. No iPod touch model is capable of running both iOS 6 and 10.

If desired, try downloading the applications to a newer iOS device first; you may then be given the option to get a compatible version.

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