Simply add the tag[[Help:Wikitext|wikitext]] markup <code><nowiki>{{lowercasetlx|Lowercase title}}</nowiki></code> at the beginning of a page (and optionally, at the beginning of its talk page). There are no parameters. The tagmarkup will only decapitalize the first letter of the page's name in the title at the beginning of the page.

! scope="row" | [[:Template:IPhone_modelsIPhone models]]

This template wraps the [[Help:Magic words|magic word]] DISPLAYTITLE so that it works automatically in any namespace (main/article, talk, template, category, etc.) to decapitalise the first letter of the name of a page it is transcluded on.