Samsung has started rolling out a new update to the dual-SIM variant of its Galaxy A8 smartphone. The update brings Android security patch for the month of October. In case you aren't aware, the standard Galaxy A8 received the October security update last month. As is usually the case with OTA roll outs, it may take time for the update to hit your device. Meanwhile, if you feel impatient, you can manually check for the update by heading to your handset's Settings menu. Via
Source: http://www.gsmarena.com/samsung_galaxy_a8_dualsim_variant_gets_security_update-news-21573.php