Any suggestions -Vista / internet data card - ?

Any suggestions - internet data card - Pay as you go Service?

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I have 2 questions.

1. I am in the process of buying a laptop ( Vista). The new laptop

does not have a

slot for an internet datacard to be inserted ...can only accomodate

a USB device for internet data service. So I will need a service that

offers the USB device. I am using T mobile (USA) ( US 49.99 per

month ) now but they do not offer a USB device in lieu of the

internet data card.

So I have to find a new service. Any suggestions of an economical

service ?

2. Since I hardly use this service - maybe once in 2 months ( for

about an hour or so ) and have been paying for this service for over 2

years! What a waste.

Is there a company in the US that offers this service on a Pay as

you go basis (AND hopefully also the USB device instead of the Data

Card ) ?

This would reduce my expense substantially.

Any suggestions ?

Or can anyone suggest any other economical service / option ?

Not being in the technical field and having little knowledge and

experience of integrating different components, technologies etc I

would prefer a company/package that makes it simple for me to get the

service going without pulling my hair out.

Any recommendations would be highly appreciated,

Ayesha Hill