A subscriber of a telephony provider can speak with a subscriber of another provider only if the two providers have concluded an interconnection agreement.
In general, any provider authorized under the law has the right to negotiate an interconnection agreement with any other provider, if they consider this necessary for their business plan.
On the other hand, a provider is not obliged to initiate the negotiation of an interconnection agreement with another provider but has the obligation to respond to the request for negotiation of such an agreement, coming from any other provider.
If an agreement is not reached after the negotiations, the interested party (the provider requesting the initiation of the negotiation) can address ANCOM.
Before signing a contract, ask the chosen provider for information on the providers with whom they have concluded interconnection agreements.
If you have already signed a contract and you cannot call certain phone numbers, check the website www.portabilitate.ro for the network where those numbers are active and ask your provider if they have a contract with the provider of the respective network.
As for the toll-free numbers (freephone numbers), in most cases, the number is allocated by a provider to a third party (an institution, a banking unit, etc.) who wants to facilitate the clients’ access to their services by offering this possibility of calling a toll-free contact number. In this case, the cost of the calls made to such a number is borne by the company that makes the service available to the public, which can choose to have the number available from a single network or from all networks.
Read more about interconnection here.