1. An apparatus, comprising: transceiver circuitry configured to establish a voice session connection over a digital voice channel of a wireless telecommunications network, to demodulate received synthesized digital data tones transmitted over the digital voice channel into a demodulated signal; a feature vector extraction module configured to perform a set of measurements on the demodulated signal and generate a first feature vector that comprises the set of measurements; and a bit sequence estimation module configured to analyze the first feature vector and generate a first estimated bit sequence based on the first feature vector; wherein the bit sequence estimation module comprises a time diversity combining component configured to: determine whether the generated first estimated bit sequence is a satisfactory representation of a segment of an original bit sequence based on preset criteria, and if the generated first estimated bit sequence is not a satisfactory representation of the segment based on the preset criteria, identify a stored second feature vector that represents the same segment of the original bit sequence and which also generates an unsatisfactory representation of the segment based on the preset criteria, wherein the stored second feature vector comprises a set of measurements of a previously demodulated signal; sum or average an Nth sub-value of the first feature vector with an Nth sub-value of the second feature vector; generate a third feature vector by analyzing the first feature vector in combination with the identified second stored feature vector, wherein the third feature vector has an Nth sub-value equal to the sum or average; generate a second estimated bit sequence based on the third feature vector; and check for errors in the second estimated bit sequence.