  Using 11.6 pb^{-1} of data collected in the energy range 0.984--1.06 GeV by
CMD-2 at VEPP-2M, the cross section of the reaction e+e- to pi+pi-pi+pi- has
been studied. For the first time an interference pattern was observed in the
energy dependence of the cross section near the phi meson. The branching ratio
of the phi to pi+pi-pi+pi- decay double suppressed by the G-parity and OZI rule
is measured Br(phi to pi+pi-pi+pi-) = (3.93 +- 1.74 +- 2.14) \cdot 10^{-6}. The
upper limits have been placed for the decays phi to pi+pi-pi+pi-pi0 and phi to
eta pi+pi-
  Br(phi to pi+pi-pi+pi-pi0) < 4.6 \cdot 10^{-6} 90% CL,
  Br(phi to eta pi+pi-) < 1.8 \cdot 10^{-5} 90% CL.
