Hi Ramchu. As a former Alltel customer service representative (yes, I was a hated one) I've spoken to many un-happy people who have done this without remembering to add a Data package to their Alltel account and then received a great big bill at the end of the month. If you have not already added one do so now and protect yourself!
Not going to use this sense I already have one of their USB data cards.
I only posted this as an FYI so that people know that it can be done.
Maybe some can use this method and add the data package to to their
cellphone for $25 to $35 a month instead of $60 a month for the data card.
Thanks for the heads up !