How do I enable or disable call waiting?

On most phones, you can manage call waiting in the call settings on your handset. If you can't, try the following commands:

Check call waiting status - *#43#, send/call

Enable call waiting - *43#, send/call

Seconds before call waiting diverts to voicemail - **61**101** (15, 20, 25, 30)#, call/send

Disable call waiting - #43#, send/call