Hidden sms message sent at every startup My Samsung GT-I8150 is sending a text message after every reboot witch is not appearing at all in the sms area of the phone. The phone is rooted and has cyanogen mod 9 installed.

I think someone at work/at home got into my phone and installed some hidden tracker. How can I detect this and also prevent this?

Thanks
Sounds more like a virus. The only guarenteed way is to flash a fresh ROM and start over. Malware is getting smarter and smarter and may be able to hide itself on the OS unless you start fresh.