An improved method of learning character segments from received text enables facilitated text input on an improved handheld electronic device. In receiving text on the handheld electronic device, the characters of the text are converted into the inputs with which the characters correspond. Then, segments and other objects are analyzed to generate a proposed character interpretation of the series of inputs. Responsive to detecting that at least a portion of the character interpretation differs from a corresponding portion of the received text, a character learning string comprising the differing characters of the received text are stored as a candidate. In response to receiving additional text on the handheld electronic device, the characters of the additional text are converted into the inputs with which the characters correspond. Then, segments and other objects are analyzed to generate another proposed character interpretation of the series of additional inputs. Responsive to detecting that at least a portion of the another character interpretation differs from a corresponding portion of the additional received text, another character learning string comprising the differing characters of the additional received text are compared with the candidate. If a set of characters in the another character learning string match characters in the candidate, the set of characters are stored as a segment.