America Movil (AMX) reported Q1 earnings late Tuesday of 0.39 Mexican peso ($0.02) per share, up from 0.31 peso a year earlier.
Three analysts polled by FactSet expected 0.42 peso.
Revenue for the quarter was 236.84 billion pesos, up from 232.04 billion pesos a year earlier.
Four analysts surveyed by FactSet expected 232.45 billion pesos.