I flashed the 19/3 Layers build with a full clean wipe including Data Formatting and Factory resetting followed by Minimal Gapps.The phone rebooted fine and restored my old apps from Playstore through WiFi.Then using Titanium I uninstalled Documents,Gallery,Slim launcher and Terminal followed by restoring Datas of Messaging,Messaging Service,Phone Messaging and Nova Launcher.The phone then after some time of satisfactory usage spontaneously started to display constantly the pop up message 'Android System Phone stopped'.The message continued still thereby causing the phone inoperable followed by automatic rebooting.I tried to reboot to recovery using Power Menu,but it was not possible.So I pulled out the battery and entered into . the recovery by replacing it,wiped Dalvik cache & Data and rebooted to System.But again the same pop up.So I went back to RR 5.3.9.In this RR and UB ROMs I was doing the same above procedure of uninstalling and restoring.There I didn't experience this problem.So what is causing here and how can it sorted out?