how can i upgrade my iphone 6 16GB to 64GB?

Adding iCloud storage does not add storage available on your iPhone.

Crissy,

Upgrading your hardware is not possible. You will have to buy a replacement phone.

Hey,

There is no upgrade for that. You have two options,you could either increase your iCloud storage if you want to have more storage or get a brand new Iphone with the specs you want (64 GB).

Thanks,

Fred

Live in the moment.