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https://ivannikitin.com/2009/08/30/d0-bd-d0-b0-d1-81-d1-82-d1-80-d0-be-d0-b9-d0-ba-d0-b0-voip-d0-bd-d0-b0-htc-4g-max-sipnet/
Настройка VoIP на HTC 4G MAX (Sipnet)