Call *77 from your telephone, 800 77 00 77 from another telephone. All these calls are free of charge in the Czech Republic.
We are available on weekdays from 8 am to 7 pm and on weekends from 8 am to 5 pm. If you need to deal with something urgent, such as SIM blocking or technical problems with your service, we can help you on the above phone numbers even outside normal working hours.