The call waiting feature on mobile phones means that users who are already using their handset for a conversation will be alerted, usually by a series of beeps, if there's another person trying to call them at the same time. We show you how to activate the function on a BlackBerry.
Get an alert you that someone's trying to call when you're already on the phone
It's worth noting that not all smartphone owners will be able to access the call waiting feature. Some operators don't give the function to Pay-as-you-go customers, so if the option is greyed out, check with your network to see if you can have access to it.
From the Home screen, press the Send Key.
Now hit Menu and then select Options.
Press the Call Waiting option (this can sometimes be found in Call Management) and select Yes.
Now press the Menu Key and choose Save.
To disable the service just change the Call Waiting option to No.