  It is shown that recent and earlier experiments, which claimed to observe a
disagreement with the global phase diagram (GPD) of the quantum Hall effect, do
not, in fact, contradict the GPD. Two aspects should be taken into account: (i)
insulating phases between quantum Hall phases are possible owing to the
Shubnikov-de Haas oscillations of the "bare" diagonal resistivity $\rho
_{xx}^{0}$; (ii) according to the two-parameter scaling theory, the filling
factor $\nu$ does not determine directly the positions of the quantum Hall
phases on the magnetic field axis at $\omega_{c}\tau \lesssim 1$.
