SaltyNZ:
The packet gateway doesn't just invent data out of thin air, so the handset must have done something even if only very little.
Understand that, but I'm struggling to work out where the charges are coming from, given the handset has mobile data turned off for the 2Degrees line.
If the handset did something <500kb on 18 and 20 that might make some sense to the billing.
But it wouldn't explain the charges on 17 and 19, unless I'm missing something?