Ruling on selling a telephone to another person for more than the price set by the state

Some of the brothers want to travel, and they want to transfer the telephone to another person for a specific amount that exceeds the amount the state set for the telephone service. Is this action permissible?
This action is permissible on the condition that the state permits it. If he says, "I want to sell it to a person for a profit,"And they said: there is nothing wrong with it, so there is nothing wrong with it.
As for if they prevent this, then it is not permissible.