We investigated the electrical‐transport properties of hydroiodic acid doped polyaniline in the temperature range 77–300 K, applying magnetic field strength to a maximum of 1 T in the frequency range 20 Hz–1 MHz. The direct‐current conductivity was explained by variable range hopping theory, and the direct‐current magnetoconductivity, which was positive, was interpreted by orbital magnetoconductivity theory. The alternating‐current (ac) conductivity was found to follow the universal dielectric response σ′(f) ∝ f^s, where σ′(f) is the frequency‐dependent real part of the complex ac conductivity, f is the frequency, and s is the frequency exponent. The trend in the variation of s, the temperature dependence of the frequency exponent, corroborated the fact that the correlated barrier hopping was the dominating charge‐transport mechanism. The ac conductivity also showed a positive variation with magnetic field, which could be interpreted by this theory. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008