I noticed today that my Samsung Galaxy S4 with CM13 (unofficial Kyasu's ROM) called two my contacts itself; those contacts were those which I keep in my blacklist; which was also why I had react to the incident. I have a passlock in my phone so calling itself is not possible without a break into my system. This implies me that my ROM was cracked, and used for own targets. This is the second time, I notice that my phone calls itself; first time, it called my favorite contact one week ago; in the other end, my friend heard only machine/random noise. Therefore, I would like to add additional measures to control the security/privacy of my phone.

How can you prevent your phone calling itself?

  • Android devices don't make calls by themselves... if you had the phone in pocket and accidentally "butt dialed" someone, set a lockscreen password or pattern to prevent it from happening.
    – acejavelin
    May 4, 2016 at 11:52
  • @acejavelin No. I have a passlock in my phone. It is not possible. It implies me that my phone was hacked by using the security wholes existing in kuysu's unofficial ROM. May 4, 2016 at 11:53
  • 1
    Don't use unofficial builds of unstable ROMs? May 4, 2016 at 13:59
  • @eldarerathis Yes, I understand it now. I would still have some extra protective features even in official unstable builds. May 4, 2016 at 14:00

1 Answer 1


I found out more stable ROM. It was not the official one which has noise artifacts, for instance. I found some patches made by Temasek/arter97 here at points (8) and (9). Using them solves the artifact noise problem, which occurs in the official CM13 and kyasu's ROM. I also switched to Temasek ROM which seems to be one of the most used unofficial ROMs. It is the most stable ROM that I have found for the device. It also supports updates directly in the software.

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