You will need
  • phone
  • - SIM card MTS
Go to menu of your mobile phone and select "Settings". They find a tab called "Challenges". Browse through to appearance on the screen "call Waiting" - select this function. A new window will open with the functions "Insert", "Cancel", "Status". Click "Enable". The screen will display "Running query". About the positive result, the phone will alert you with the phrase "call Waiting enabled".
The inclusion of the second line of the MTS through the settings of the phone came the message "Not out"/"call Waiting is not enabled". This situation could occur for several reasons. First: you have powersil try activating out of coverage. Second: when the query operator is "frozen". Third: the fault of the phone.
Wait for a while, change a place of stay or reboot the phone. After you follow these steps, then try again. At repeated failure - see 4
Activate the service through the command request in the MTS. Dial *43# and press call. Your number will be automatically connected to the desired option and you will immediately notify the system.