android system update in custom rom I am using a custom rooted android device (not used by anyone else) which comes with android 4.1.2 custom rom.

Suddenly I received an auto update notification and everything was erased... it was a total mess...


Where does my device get the link to download the update from?
How do I disable the auto update?


Even if those things are totally differ from one device to another, I would be very glad to receive a few leads...

thank you.
If your device is a popular device then chances are you will be having updates at least once a month.

You can use GooManager app to update your Custom rom GooManager APP link.


  GooManager automatically checks your custom rom and search for
  updates.
  
  This app is a front-end for the Android file hosting site, Goo.im. It
  allows for downloads of ROMs, Google Apps packages, kernels, apps, and
  any other file available via the website. Update notifcations are
  available for ROMs and Google Apps packages. Please note that
  notifications are not via GCM (push messages) but run at start-up, and
  every 2-24 hours (configurable in-app).