Permission and authority are hereby granted for the period of 25 years from and after the acceptance of this franchise as herein provided to Central Scott Telephone Company, its successors or assigns (hereinafter called the grantee), it being expressly understood that said permission and authority are non-exclusive, to acquire, construct and maintain in the incorporated city, as the same are now or may hereafter be extended or located, the necessary facilities for the receiving and transmitting of messages by telephone, using wires, cables, carrier, microwave and/or electronic and/or other methods, for public and private use, and to sell and furnish telephone service to the city and its inhabitants, for all purposes, and to construct and maintain along, upon, across or under the streets, highways, avenues, alleys, bridges and public places the necessary fixtures, apparatus and equipment for such purposes, which shall be located, arranged and maintained so as not to endanger persons or unnecessarily hinder or obstruct the free use of streets, alleys or private property.