Carrier IQ has been at the forefront of some serious privacy concerns after a Youtube video by Trevor Eckhart showed how plain text "https" displayed on the device. Carrier IQ has stated that their software is deployed in a variety of phones to help the carriers improve the end user experience.
If you're concerned that your phone may have Carrier IQ installed checkout this list - AT&T, Sprint, Samsung, and HTC Explain Carrier IQ Implementations
