Even if Apple hasn't yet sent you a tracking number for your shiny new iPhone 6s or 6s Plus, you may still be able to hone in on its shipping progress. Thanks to a neat trick pointed out by Macworld, you can get a handle on your new iPhone's current location armed with nothing more than your phone number.
To get started, you'll want to navigate to the UPS tracking site. From there, click the dropdown labeled "Track by Reference" and then type the phone number associated with your new iPhone into the "Shipment Reference" box. After that's done, just click on the "Track" button and you should be off to the races.
Once you're on the tracking status page, you'll be able to see the progress of your shipment, and you'll also now have access to your tracking number for easy reference. Keep in mind that, when entering your information, you can narrow things down a bit by also inputting your destination country and zip code, if necessary.