Electronics

[mima]

I understand that there is not a contract and you can buy just one month of 3/4G service. I'm going to give you a made up scenario so that I can explain what I want to ask.

Say the 3/4G carriers have two plans. One plan is $15 a month for the smaller plan and for $25 you get twice as much usage.

I buy the smallest plan that is $15 for a month. In two weeks I run out and I will need to buy more GB. At that point, can I just pay $10 more to get the bigger plan and have it good until the end of the month, or do I again need to choose which plan to pay for?

Thanks!

If you don't understand, I'll try to explain more.