[. . . ] [. . . ] The communication range quoted is calculated based on an unobstructed line of sight test under optimum conditions. Your actual range will be limited by several factors including, but not limited to: terrain, weather conditions, electromagnetic interference, and obstructions. Certain phone features may not be activated by your service provider, and/or their network settings may limit the feature's functionality. All features, functionality and other product specifications are subject to change without notice or obligation. [. . . ] [. . . ]