Millenicom's national network is comprised of many different backbones which allows us redundancy in all major cities. Each network currently operates independently of each other. You must use the access numbers of the network you originally sign onto. If you sign on using an access number on the B network, your account will activate on any number listed in any city shown on the B network ONLY. It will not activate on the C network. Click here to view all Millenicom Networks. Click here to view all Millenicom Networks.