Keep in mind that preparing for shipment isn't just one little phone on a plane. It's a massive brick of boxes with boxes in them containing boxes phones.
Theyre filling up entire cargo planes with as much as they can fit as fast as they can fill them up.
So, 3-4 days is the process from 'registering' the phone to you, boxing it with your address on some assembly line, putting those into boxes. And possibly into an even bigger box. Loaded onto a pallet, wrapped, strapped down. Loaded into a truck. And then trucked to the airport. Unloaded and then loaded onto a plane. Checked and double checked. Loaded, strapped down again, and repeat for a ton more pallets.
And then the plane is ready to take off the captain and crew arrive, paperwork is filled out, and when weather and visibility are good, clearance is given and the plane takes off.
I mean, 3-4 days for whole that process is nothing!
🙂