On June 3 I initiated 3G service from the iPad for the 250MB plan for $14,99, which was immediately charged to my cc. On June 4 I wanted to upgrade to the unlimited plan for $29.99. Surprisingly that was also charged to my cc. Both charges have been paid to ATT. ATT says tough, there's nothing they can do about it. Meanwhile I am using about 50MB/mo and want to go back to the original 250MB plan. ATT says if I do so I will be charged another $14.99 or almost $60. Has anyone else experience this?