The phones now receive the more sophisticated version of predictions. The phone users can walk out of range and back in without problems. Some phone models will disconnect if the screen isn’t locked, but it isn’t a problem if you lock the phone screen. You wont normally keep the screen active anyway.
The next mod is to get the earlier predictions (1-3 seconds after ball release), and the updated release will be available to players. It may be about 3 weeks from now though as there is a lot of work to be done to ensure everything is right.