Yes, you can track from any phone with a web browser. It can be a PDA, BlackBerry, Pocket PC (PPC, SmartPhone), Palm, or any WAP 1.1 compatible phone from any carrier (Cingular, AT&T, T-Mobile, Sprint, Verizon...). Just open the browser on the phone and go to the AccuTracking Mobile site: http://mobile.accutracking.com (for a demo, use username "demo" with password "demo").
Tip: How to do that on i415: from the phone idle screen, press "menu" key on the keypad, then "Web" > "Web Search" > "Enter Site", then enter the AccuTracking Mobile site.