Phone makers RIM and Nokia denied installing onĀ their mobile devicesĀ an app which can monitor what users are doing without their knowledge or consent while carriers AT&T and Sprint admitted to using it. The companies responded after a security researcher demonstrated in online videos how the “Carrier IQ” software worked on Google’s Android operating system and said that phones running RIM’s BlackBerry platform and Nokia’s Symbian OS also had the software installed. AT&T and Sprint said they use “Carrier IQ” to monitor network quality.