1ion, It is ofc not my intention of sounding rude, so please don't be offended - but do you even read my answers?
I wrote, to you, 4 posts above this one - Thats it's a known limitation in QtMobility, I also wrote on the 1st post that it is a limitation I cannot alter, and I am waiting for the solution to come with mobility 1.0.1

Unless you can speed that up, it's entirely not up to me, or you.

When this is solved, you will be able to type the minimum number of needed chars in last / middle / first name, and the contact will appear by itself.
If you have a few contacts starting with the same letters, they will all appear and with 1 click you will be able to select the contact to see it's details, and 1 more click to call