Not accusing there's a conspiracy, but if there is... Are the phones really in NZ, or is it just DHL's systems telling everyone so? (Including the DHL employee

Not accusing there's a conspiracy, but if there is... Are the phones really in NZ, or is it just DHL's systems telling everyone so? (Including the DHL employees, remember the best way to keep a secret is to keep the number of people in the know low) It's a far enough location that the fictional return journey will take a while, so enough time for whichever agency to install whatever they need onto the phones.