I've created one site for financial services, the site also offers that clients can access the site from their mobile. I've created some part, but I've to test it through my mobile - which is expensive also.

Is there any way by which I can test, I know coding things but I would like to have a preview/test it.

You could use Opera to see what the wap site would look like. Click on view and then select small screen.

I hope this helps.
Can opera work likes a real phone, for example , download a picture.