O2 SIM to SIM Start
(O2 SIM to SIM - detailed information about the service.)
Every group of people who can call each other for free can have up to seven members. The founder invites other members to participate. You can be the founder or a member of one group only.
Start a group
Choose up to six friends who are O2 customers and send them an SMS invitation. By accepting the first member, you start a group. A customer with a prepaid O2 karta cannot be the founder.
How to invite friends
- NAVS XXXXXXXXX
- to the phone number 999111
Each of these SMS invitations, and the corresponding SMS replies, are free of charge.
Join a group
Simply reply to the group founder’s invitation.
- to accept membership answer the invitation with an A
- to refuse membership answer the invitation with an N
You can leave the group at any time. Send an SMS with the keywords NAV D to the phone number 999111.
Prices
There are no fees for setting up or canceling a group, or for removing a group member. As the founder, you will be charged a fee of CZK 95 the second time you set up a group, switch variants, or add a member to replace another member that has been removed from your group of seven within one billing period.
You are charged a proportional amount of the monthly fee based on the number of days you use the service. Customers with a prepaid O2 karta are charged the fees on a weekly basis (12.50 CZK/week).
Prices only apply to calling within the domestic O2 network; when abroad you are charged regular rates according to your roaming pricelist.



