Hi all... New to this thread and android. I currently have a Samsung s3 with jb 4.1.2 on it. After the upgrade I have realised contacts app has a little more lag while loading. I have read that installing a third party contacts app could be one quick workaround. However if I install a third part contacts app... Will it delete/uninstall the stock contacts app? Not being able to get this answer anywhere! Thanks!