Methods, devices and systems enable efficient organizations of group communications on a mobile device. The mobile device may be configured to receive location information from other mobile devices in a communication system, determine the current location and orientation of the mobile device, determine directions and distances from the mobile device to each of the other mobile devices, and generate a first-person perspective and/or top-down perspective display showing relative locations of the other mobile devices. Other multiple mobile devices may be represented in the display as images (e.g., icons, avatars, directional indicators, etc.). The display may provide a user interface to enable a user to quickly organize other mobile devices into groups and initiate group communications with some of the other mobile devices. The mobile device may be configured to group the displayed images into one or more communication units and establish communication links with mobile devices in the communication units.