Phone Numbers

Browsing with an Iphone 3GS, the phone numbers are recognized on the regular version of the site. When I'm browsing the site with the Mobile Joomla! version, the phone numbers are not recognized. Can somebody tell me why this happens or a solution if there is one? Thanks.

I'm answering myself. The answer is done by the next example editing your contact article with html editor in joomla!
<a href="tel:+1-800-275-2273">
Call Apple Customer Support at 1-800-275-2273
</a>.