Racine is still in the Milwaukee SID, 4153. So it would stay on 1900MHz until you are in Kenosha and lose 4153 signal (Kenosha is Chicago SID). When you leave Racine and come back, then you will connect with Racine 800 because your phone will look for that first. I actually hung onto 800MHz in Sturtevant all the way up to Oak Creek before it dropped out and connected to a much stronger 1900 signal I'm not sure how usable the signal was but that summarizes your phone locking onto that frequency for as long as it can.