a lot of telefone flat (except telecom) is very expensive if you want ro make telefone calls outside germany. a telekom falt is in the base a litttel bit more expensive but you can use inside each other telecom-company, so you can select your proce for calls which are more expensive. My 3 examples ro call 10 hours per month from germany to colombia/america latin:
- pure telekom (20 minutes aprox 20 €)
- netcologne (the base flat is 10€ less rhen teleckom base flat), 10 hourse to colombie 600 € each month
- telecom flat but calling another indicative 010..., using another comopany for the calls to colombia, each month aprox 55€ inclusice the 10 hours.