АУ (mobile callback)
You can use АУ (mobile callback) for order callback and ballance for voip-providers pctel.ru, comtube.ru, sipnet.ru etc. I.e. you can call from your russian mobile phone to other russian mobile phone for 2 rubles per minute !
mobile callback, обратный вызов с мобильного. 
You can use АУ (mobile callback) for order callback and ballance for voip-providers pctel.ru, comtube.ru, sipnet.ru etc. I.e. you can call from your russian mobile phone to other russian mobile phone for 2 rubles per minute !