String sphone = "9000000000";
        Uri uri = Uri.parse("tel:" + Uri.encode(sphone));
        Intent intent = new Intent("android.intent.action.VIEW");
        intent.setClassName("com.viber.voip", "com.viber.voip.WelcomeActivity");
        intent.setData(uri);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        AppContext.getAppContext().startActivity(intent);

Uri uri = Uri.parse("smsto:" + "9211889055");
Intent i = new Intent(Intent.ACTION_SENDTO, uri);
i.setPackage("com.whatsapp");
startActivity(Intent.createChooser(i, ""));

Uri uri = Uri.parse("fb-messenger://user/");
uri = ContentUris.withAppendedId(uri,100001899606015L);
Intent intent = new Intent(Intent.ACTION_VIEW, uri);
startActivity(intent);