[inquisitor]

Fonic, a MVNO on the O2 network, has announced to reduce tariffs for international calls from Germany to 50 countries including Europe and North America soon. Calling landlines of those 50 countries, which were not disclosed yet, will be charged with 9 ct/min while mobile networks will be available for 29 ct/min. SMS to networks abroad will cost 19 ct/min.

Regarding national rates Fonic already offers attractive rates - calls to all national fixed and mobile networks cost 9 ct/min. The same price applies for national SMS.
For € 2,50 Fonic customers get a whole day of internet access through O2's EDGE- and HSPA-enabled network.

Since Fonic SIMs are sold at Lidl, Real, Müller and dm supermarkets as well as at Jet gasstations for € 10, they are easy to get and so are recharge vouchers. Although officially disclaimed, Fonic SIMs can be recharged with "O2 Loop Up" vouchers, which are available at every turn.

All in all Fonic appears to become an ideal choice for travellers and tourists visiting Germany.

As soon as further details pop up, I will give you an update.