[divtxt]

I just polled some friends on chat:

- iPhone + Vodafone Bangalore - SMS notifications - inconsistent frequency

- Galaxy Y + Airtel Bangalore - SMS alert only

so it seems carrier/plan dependent to me!

> it sends whenever there's 3G transaction and the usage period ends

Sure - what I was guessing is that sometimes the phone is on a "single" 3G connection all day & there's no alert, and some days the phone makes "many" 3G connections & there are lots of alerts. (or perhaps it does not work this way & there's some other cause - not a telecom expert!)

[EDIT: oops both friends say they get SMS not USSD alerts]