What is the expiry period for the US pay per use rates. In other words, if I don't have a roaming add-on I wil be charged $5 for my first kB of data and can then use up to 20 MB. How long do I have to use the 20 MB?
So if it is on a billing cycle, you could use 2 MB over 2 days and be charged $10, or you could use 20 MB over a 2 week period and only pay $5. It just depends on how your travel dates line up with your billing cycle?