How come my iphone country code was ZP/A not ZA?

Because the phone was intended to be sold in Hong Kong or Macau.

ZA: Singapore

ZP: Hong Kong, Macau

Hello jennjennifer,

To help us better assist you, can you let us know more about your question? For example, which code are you referring to? Where did the code appear?

The above details will help us plan how to proceed.

If you're referring to information when trying to identify your iPhone model, please check out this link, as it has some information that may help: Identify your iPhone model

iPhone 5s

Year introduced: 2013

Capacity: 16, 32, 64 GB

Colors: Space gray, silver, gold

Model number on the back cover: A1453, A1457, A1518, A1528,

A1530, A1533

Details: The front is flat and made of glass. The back is anodized aluminum. The Home button contains Touch ID. There's a True Tone LED flash on the back and a SIM tray on the right side that holds a "fourth form factor" (4FF) nano-SIM card. The IMEI is etched on the back cover.

See the tech specs for iPhone 5s.

Thanks!