New iPhone 16 Pro not charging with its original charger

Take the cable back to the seller and ask for a new cable.

"New iPhone 16 Pro not charging with its original charger: I buy my new i phone 16 pro just few days ago .but it’s not charging with this cable which one is in the box.but other cable is working"

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Fix a Few Bugs:

Plug your iPhone into your Computer. See if you get a charge. If so, install an update. The most recent update (iOS18,3) was release just a day to so ago, as of this reply.

Updating Using a Computer:

Have a Computer Handy? If so, try using a computer to update. Go here: Update your iPhone Using a Computer - User Tip. If WiFi is not a successful option for you, then see about using Ethernet to get a reliable signal. If there is not Ethernet port, then his would be the adapter to use: The Belkin USB-C to Gigabit Ethernet Adapter - Apple