If suddenly your LG G2 phone started un-installing VuTalk don’t panic its not malware. LG decided to discontinue the VuTalk app and with it made sure that no one uses it anymore by automatically removing it from every phone that had it installed. The app that your phone downloaded automatically was used to delete all data that was kept on the phone by VuTalk and then removed itself.
The reasons they did that remain unknown, probably not a lot of users were using it and it turns out it wasn’t worth their trouble updating it. Unfortunately they didn’t warn users or given them the option to keep the app even if no longer supported. So if you were a fan of sending drawings to your contacts, LG just said ‘Tough Luck’ to you. If you know the exact reason, please post a comment to enlighten us too!