Texting, contact manager and Autocomplete
 

Most contacts autocomplete when I am trying to address a txt, but it seems the users I send to most don't.
Is there a cache limit for autocomplete?
Is there a priority thread I could increase on a few to get them on the list?

I have tried recreating contacts, there doesn't seem to be any ryme or reason to who it works and won't work on.
Thanks in advance for any input.

EDIT**
I founds a few settings in HKCU\Software\Microsoft\Inbox\settings (like deleted,sent and inbox count.)
Thought I found what I was looking for here, HKCU\ControlPanel\PhoneExtendedFunction\CDMA\SMS
Value Name IS637MaxAsciiCharactersRx
Value Data 300.

So far no luck.

Make sure in the contact that the number you have for them is listed as "mobile tel" number instead of Work or Home