can someone explain this?

I have a motorokrv6m with Metro Pcs and it does so much weird stuff i swear it's tapped. my friend calls and when i answer i can hear the voicemail as if someone is remotely checking my vm. i ask her if she can hear it but she can't and after the vm commands start saying "press 7 to delete, 9 to save" etc. then "are you still there?' it just disconnects and she never heard it and my phone didn't show that i could have possibly accidentaly dialed my vm in the recent calls list. i've heard metro pcs not only violates customers privacy but that they also work closely with police if they hear any "suspicious activity" Also does anyone know if it's true that Boost mobile's motorola i425 phone switches frequencies everytime u use the walkie talkie chirp feature? or is it more vulnerable than just talking on the phone?