Criminals have the right to hide their activity from the Police?
I think many people here are being closed minded about this topic.
If the police have enough suspicion and evidence to approach a judge and get a phone tapped there is probably a very good reason for this. Who would want to stand in the way? Certainly not me.
It's not being suggested that we hand over all our phone data freely. Stop waving the freedom flag (before you wear it out and compromise other serious privacy issues) and look at the issue at hand.