A method of operating user equipment to wirelessly communicate with external communications equipment as the user equipment moves through a geographic area, wherein the user equipment comprises control circuitry, an antenna, an output device, and measurement circuitry, the method comprising:
- with the antenna, receiving radio-frequency signals transmitted by the external communications equipment;
- with the measurement circuitry, generating wireless performance metric values from the radio-frequency signals received by the antenna as the user equipment moves through the geographic area;
- with the control circuitry, determining whether the wireless performance metric values exceed, for a time period, a threshold value;
- with the control circuitry, storing a respective geographic location of the user equipment at a location in the geographic area when the wireless performance metric values exceed, for the time period, the threshold value;
- and
- with the control circuitry, in response to a trigger condition, controlling the output device to produce an output that identifies a stored geographic location.