Android and iPhone devices automatically attempt to detect text in HTML that corresponds to phone numbers, and turn this text into a link that calls that number. While this can be a useful feature, there will be occasions when you want to disable this feature. This can be achieved simply in HTML by adding the following in the page head section:
<meta name="format-detection" content="telephone=no" />
You can still enable linking of specific parts of the markup on the page by explicitly placing a link around that element, and using the tel protocol for the href value:
<a href="tel://01234567890"><img src="phone.png" /></a>
This is especially useful for graphical elements (e.g. an image of a phone) that wouldn’t be automatically detected.