Hi, yes it means Georg(e), in another forum georg was already used....
At present I use
SparRuf – mit dem Handy billig ins Ausland telefonieren
There are some call-by-call numbers around 17ct/min which I never used.
Sparruf works reliable (19ct/min), it can also be used for callback with the airBalticcard.
You can also use your Sparruf landline number to forward your calls. Callers pay german landline (free with flatrate) and you pay 19ct/ min which is even cheaper than normal 26ct/min for incoming roaming calls abroad.
Normally I use
DialNow | Cheap International Calls but the airBalticcard cannot be reached normally, but once it worked!