From a Home screen, tap the Contacts icon.
These instructions apply to Home mode only.
From the Contacts tab, tap the appropriate contact.
Tap the Edit icon (at the top).
Enter/edit any of following info then tap SAVE (lower-right):
To change the account type, tap the Dropdown menu (upper-right) then tap the desired account (e.g., SIM, Google, etc.).
Available options may vary.
To add a pause (a 2-second delay between numbers) or wait, tap .-( then tap P or W as appropriate.