Just writing an article for future reference. It's a simple thing that I don't know how to do and can't find information about...
Someone reported that when they open the download link for an enterprise package using iPhone Safari, it prompts to download an apk file.
At first, I thought it was because the user manually set the userAgent, but later I found out that it was because the "Request Desktop Website" switch in Safari settings was turned on...
As shown in the image below, the switch at the bottom should be turned off.