The law was changed in Estonia. The new law states what happens when the phone network is down.
Starting from October 1st, customers can use another operator's network. This happens when their own network is not working.
If one operator's network is down, people can use another operator's network. The phone will automatically select the new network.
This rule applies throughout Estonia. Estonia is small, so this applies everywhere.
This rule helps in serious situations. For example, during war or a major storm. During a storm, this rule cannot be used. It is only for serious situations.
Phone companies must be prepared for crises. They have backup power and batteries. For example, Tele 2 says their network works even during a power outage. This ensures that the phone network works throughout Estonia.