Is it possible to make telephone numbers hot links? We have a Collector app and we would like for our inspectors to be able to call the business owners by just tapping on the number. We have tried formatting (XXX) XXX-XXXX and we have tried HTML but neither worked. I thought I had it working at one point by just using the formatting with a small sample of data but once I loaded the the full data in it didn't work after all. Any help (including nope you can't do that) would be appreciated.
I came across this link: Phone Links which shows two ways to create a link to a phone number.
Native app URL string:
What surprised me is that the Native App URL works in ArcGIS for Desktop
... and when published to ArcGIS Online the HTML link works in a web map:
However, when these fields are consumed by collector both don't seem to work.
So, it might not be possible, but it would be a great addition!
I just came across this same need.
It is very frustrating that ArcGIS online does recognize phone number hotlinks, and Colletor, which is a MOBILE app, does not.