Part Two When companies weigh the relative merits of cell phones and two-way radios, there’s one group that has to stay top of mind: the users. These are the people actually using the equipment, after all. This series of articles has examined communications philosophy, urgency, coverage, reliability, and security. Now we turn our discussion of cell phones and two-way radios to users’ concerns, which center on durability and ease of use. How many people .