Mobile Channels support for URL protocols is described in the following table.
| URL protocol | Palm-size PC | H/PC (2.0) |
| HTTP | Yes | Yes |
| MCTP | Yes | No |
| HTTPS | No—Mobile Channels does not directly support browsing | No—Mobile Channels does not directly support browsing |
| FTP | No—Mobile Channels does not directly support browsing | No—Mobile Channels does not directly support browsing |
| FILE | No—Mobile Channels does not directly support browsing | No—Mobile Channels does not directly support browsing |
Note Windows CE supports a basic URL resolution process that, in some cases, is not fully compatible with Internet Explorer 4.0 and other browsers. Specifically, Mobile Channels does not always resolve relative URLs. Therefore, use only absolute URLs for images and .htm files. For example, <A HREF=“PAGEONE.HTM”>Page One</A> and <IMG SRC=“BOX.GIF”> are invalid. Use <A HREF=“http://www.microsoft.com/test/pageone.htm”>Page One</A> and <IMG SRC=“http://www.microsoft.com/test/box.gif”> instead.