At energies 4s — 1.0-1.4 GeV we should expect a threshold enhancement of the cross section for the reaction β⁺β~^>ηπ⁺π~ because the reaction channel e⁺e~^ρ^7]ρ^7)π⁺7T~ comes into play. The width of the decay φ^>ηπ⁺π~~ has been calculated for the first time: Br(^—>ηπ⁺π~) = 0.35X 10~⁶. This width can be extracted from the interference pattern.