forgot how to add the telephone extension to the phone #, and this lets call go thru faster to intended party

Automate dialing an extension or passcode



• If the number you’re calling requires dialing an extension, iPhone can enter it for you. When editing a contact’s phone number, tap , then do any of the following:
• Tap Pause to enter a two-second pause (a two-second pause is represented as a comma in the phone number).
• Tap Wait to stop dialing until you tap Dial again (wait-to-dial is represented as a semicolon in the phone number).

Use Contacts from the Phone app on iPhone