For my iPad one I bought an O2 data package with a very fair price. 200 MB data cost just 10 €.
But additionaly the offer had another plus, the 10€ are only charged when you use the mobile net of O2 in a month.
Otherwise nothing is charged. Unlicely I can’t find that data package on the O2 website anymore.
I’m searching for a data package with approximatly 500 – 1000 MB and 7.2 MBit/s. The datarate should be reduced after reaching the data limit.
No mobile provider had the pay just when you use option.
A fair price for such a data package would be 15 € in my opinion.
One possible offer was from FYVE – Prepaid Smartphone Surfen für 5,- € im Monat. which is still interesting and worth testing.
Another possible one could be from Congster, Endlos mobil surfen und günstig telefonieren für sensationelle 9,99 EUR/ Monat. hmm ?!?