Wanted to get my sister a mobile PAYG broadband dongle for Christmas. Was originally going to get the 3 one, since we're all already on 3, but they have a 30 day expiry on top-ups (she is always broke, there is no way she'll be able to top it up once a month)
Vodafone dont, but a 1GB topup for them is 15, that seems really expensive. I suppose I'm just paying for the no expiry?
The advantage with Vodafone is that living in Newbury, signal should be superb

Is there any others that dont have expiry dates?