my name is nurdin on facebook A536 lenovo community group : https://www.facebook.com/groups/lenovoa536/ we in Indonesia have problems with Lenovo A536 between these problems are: 1. namely when playing music using earphones or headsets while browsing the Internet, the music is often interrupted or stopped itself without cause and headset icon flashes. we've tried to upgrade frameware to s161 but no change. This is very annoying as hell so many users Lenovo A536 resell smartphone. 2. Signal sim 1 looks unstable, in the sense not as normal as other smartphones, so the internet connection was not smooth, if I compare it with the Lenovo A390 using the same sim card. 3. The early use frameware S128 battery feels normal, and when in upgrading frameware to s147, s161 S150 or the battery does not seem normal, because of the 100% battery level dropped drastically is not the same as S128. The third case occurred in all Lenovo A536 smartphone in Indonesia, therefore I appeal to the R & D can improve the 3 things.