Enjoy free, unlimited calling between two O2 mobile numbers at any time. O2 SIM to SIM is included in the monthly fee for O2 Internet or O2 TV.
This service is no longer available. Information on this page is for customers who ordered the service before its termination.
You can make free calls simply by having two O2 numbers on the same invoice, and adding O2 SIM to SIM to your O2 Internet or O2 TV service. We can transfer mobile numbers to one invoice for you at any time, free of charge. Just stop by an O2 Shop.
Call without paying
You can use the O2 SIM to SIM service with any two of the following mobile tariffs:
- O2 NEON S, M, L, XL, XXL, and SMS
- Bronz, Silver, Gold, Diamond, and their Max variants
- O2 Simple 240, 600, 980, 1350, 1980
- O2 Individual
- O2 Praktik, O2 SMS, and O2 SMS Max
- O2 Relax and O2 Relax Plus
When calling other numbers, making international calls, and sending SMS messages, you are charged according to your tariff.
