Is the Iwatch 3 series A1858 model compatible with iphone 15 pro max ?
My wife resently buy an iphone 15 pro max but I can't connect your iwatch 3 series with the new iphone maybe this I watch is no more compatible with iphone 15 ?
The product is called Apple Watch, not iwatch.
Here is the remedy.
If you can't pair an Apple Watch with your iPhone - Apple Support