New iPhone
I have a new iPhone, i want to transfer all my information from the old i phone to new iPhone.
I have a new iPhone, i want to transfer all my information from the old i phone to new iPhone.
You have not mentioned the iPhone Model.
Old one is iPhone 6 and the new one is iPhone 8
Read the above Apple link, it really does give you all the alternatives, Quick Start, via iCloud or via iTunes, there are additional links within the help article that may also be of use.
New iPhone