1. From the Home screen, select Settings.
2. Select Phone.
3. Select Edit Speed Dial, When you select Edit Speed Dial it brings up your Speed dial list. Scroll to the number you want to change and select it, (press on it), then a small window opens with 2 selections - Edit or Delete, choose Edit and the press on the item you want to change, i.e. Name - Number etc. then make your change/s and OK out.