This disclosure provides methods, apparatuses, and computer-readable mediums for visualizing coverage area deficiencies. In an aspect, a method comprises retrieving, from a data storage, network performance data from a plurality of user wireless mobile devices; filtering the network performance data to narrow the dataset to data samples with accurate locations and dates; counting the number of data samples indicating a coverage deficiency in an area; comparing the number of data samples indicating the coverage deficiency in the area with a predefined threshold; rendering a map including the area; and displaying on the map a visual indicator of the coverage deficiency based on the number of data samples indicating the coverage deficiency in the area exceeding the predefined threshold.