On both iPhone and Android, you can dial an extension number without manually going through the main line. You can do this using your phone’s built-in Phone app, and we’ll show you how.
If you’re on an iPhone and you want to reach an extension number, then first, launch the Phone app.
In the Phone app, enter the main phone number. This is the number before the extension.
You’ll now add a pause after the main phone number. To do that, press and hold down the * (asterisk) button on the keypad. You’ll see a comma after your phone number.
Now press the extension number you want to connect to. Then, hit the Call key.
Your iPhone will directly connect you to the specified extension number, and…
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