I have a Motorola Droid, using the free version of PDAnet to supply internet to my Macbook Pro. I know it has the 14 day free trial, but will I get slapped with any hidden charges with this application? I do have unlimited txt and data, 550 anytime min and from what I understand it uses my data to give me internet. However on my Blackberry I know there was a 5 GB limit per/ month with its tethering feature. Same with this application?