After the trial period on pdanet (about a week I think) you will be limited to unsecured websites only. So if you plan on doing any banking or even Facebook I think is a secure site you will need to purchase the license from them. When I got it it was $9.99 one time fee and totally worth it for me. Also it stays with you as long as you do not switch operating systems. So if you upgrade to another iPhone you will not have to pay again but should you journey over to droid or something you will have to pay again.....