I am visiting USA and would like to get a prepaid data sim card for my Ipad2?

I will be in Denver and Los Angeles for 11 days in September.

1) Any suggestion which prepaid data card to get?

2) I would like to be able to call and use the internetI am visiting USA and would like to get a prepaid data sim card for my Ipad2?
There are only two GSM carriers in the US, AT%26amp;T and T-Mobile. AT%26amp;T has much better coverage.



The link below shows AT%26amp;T's prepaid ipad SIM, $25/mo for 2GB. You should be able to get it at an AT%26amp;T retail store.I am visiting USA and would like to get a prepaid data sim card for my Ipad2?
The first answer is correct and T-Mobile tends to not have good coverage outside urban areas, but it you are not going to the countryside then compare:



http://www.t-mobile.com/