i want to update my software, but it’s not happen?

See if the following support article can help: If your iPhone, iPad, or iPod touch won't update - Apple Support

vishnoiashok46 Said:

"i want to update my software, but it’s not happen?: my software not updated on my iphone so i want to help for updating my software"

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Update Using a Computer:

See my User Tip: Update your iPhone Using a Computer - User Tip.