A device may receive, over a radio access network and from a first user device, an indication that the first user device and a second user device are to communicate, and may obtain session setup information for establishing a communication session, via a local network, between the first user device and the second user device. This double blow molding process is characterized in that, just before the secondary blow molding step, the secondary intermediate product on standby is maintained at a temperature at least 40\xb0 C. the output voltage or current, of a fuel cell to a desired value, efficiently transferring the available fuel cell power to a rechargeable battery and load, and isolating the fuel cell from the battery and load. In this way, spam countermeasures based upon duplicate detection schemes are foiled.