Almost as bad as copying a phone number on iOS instead of calling it (no idea if this is better on Android). The eagerness of iOS to call phone numbers which almost never is the thing I want to happen, is a source of much anxiety.
Android works great - lets you select the # and then gives you a context menu with the option to call (or copy, or search).
...unless someone made the phone # a tel: protocol link, in which case it has the selection behavior of any other link. Which is mostly fine, since "copy" is a context menu option for tel: links... unless some jerk put a tel: URL in that isn't the same number as what is shown in the text of the link, in which case it's time for some crazy hoop-jumping to either copy OR call the number.
