How I upgrade to iOS 12 for my iPhone 6
How can I upgrade my iPhone 6 to iOS 12.5.1
iPhone 6, iOS 10
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Read or watch these links:
"Update your iPhone, iPad, or iPod touch" click here -->
https://support.apple.com/HT204204
Or this video:
"How to update your iPhone or iPad" click here --> https://youtu.be/csJAEyvvruY
P.S. It will be 12.5.2