the stock dialer on this thing is HORRENDOUS!!!!!!!!!!!!
Can't speed dial. Can't type letters to quick search. Best bet is leave it on frequently called. Then even if same contact home and mobile are in frequently called, it asks you which you want to call no matter which you click on (if ur gonna have both numbers showing as 2 different on freq called, just call that one when i click it) Then need to switch to dialer if not in contact list.
Hit the little phone symbol instead of the actual contact (to the left) and it will dial directly the mobile or home, whichever call was. Either that or this is is a setting, because mine does it fine.
Speed dials is the starred contacts. Put a star on them and they tile nicely at the very top of the frequently dialed numbers.
Type letters to search from any search screen -- the unified search bar outside the phone app (on any screen) or just tap the search symbol.
I think everything works better if you don't think of the number pad as the "entry" screen to the phone. The number pad does almost nothing for you. Don't start there. Start on the frequently called numbers screen to the right. You're lightning quick where you need to be from there.