Find "Keypad"
Press Apps.

Press Phone.

Press the Keypad tab.

Assign contact to speed dialling key
Press the Menu key.
Speed dialling key 1 is for voicemail.

Press Speed dial setting.
Speed dialling key 1 is for voicemail.

Press the required speed dialling key.
Speed dialling key 1 is for voicemail.

Press the required contact.
Speed dialling key 1 is for voicemail.

Exit
Press the Home key to return to standby mode.
