What does iPhone 16,1 mean on my iPhone 15 Pro?

It is an internal model identifier. The numbering scheme is separate from that for iPhone model names.

MacTracker shows that model ID iPhone16,1 corresponds to exactly one iPhone model: the iPhone 15 Pro. (With Macs, Apple has sometimes used a single model ID for models from several different years!)

It doesn't mean that an iPhone 16 device signed in to one of your accounts.

It sounds like the message was simply a log entry saying that your iPhone 15 Pro (model identifier iPhone16,1) had applied some sort of update to itself. Something that might be of interest to a developer or to a support person in the event that they were trying to troubleshoot a problem happening with a phone.

Since the message probably wasn't meant mainly for your consumption, whoever coded the message felt free to use an internal model identifier instead of your phone's official marketing name.

phakawadee wrote:

Hi my device is iPhone 15 pro so all iPhone 15 pro have 16,1 model identifiers is that’s right?

Correct. iPhone 15 Pro uses the model identifier iPhone16,1.

Get yourself a copy of MacTracker from the App Store.

MacTracker is available for iOS, iPadOS, and macOS.

https://apps.apple.com/us/app/mactracker/id311421597

phakawadee wrote:

So it means not an iPhone 16 device signed in to my iPhone 15 pro device account right?

Here is a list of models and model codes for iPhone, iPad, Watch, and some other Apple gear (but not Mac):

• https://gist.github.com/adamawolf/3048717

This numbering scheme goes back roughly thirty years at Apple, well before iPhone (with Mac):

• https://everymac.com/systems/by_capability/mac-specs-by-machine-model-machine-id.html

It's one of Apple's model identifiers.

(260215)

You are likely looking at information in Analytics which will tell you nothing.

You need to have special software to even read the data in Analytics and special training to interpret the results.

Don't waste your time trying to look at anything in Analytics.

phakawadee wrote:

Hi my device is iPhone 15 pro so all iPhone 15 pro have 16,1 model identifiers is that’s right?

Yes!

Correct.

(260223)