Hello,
I was finally able to connect my mobile phone, model without nav. steps to follow:
1-install lg mirror drive 1.2.1.2 (install Aptoide app and change the version to 1.2.1.2) you don´t need car mode, i suceed without it.
2-install rock scout
3-erase some data and cache from lg and rockscout
4-restart phone
5-open mirrorlink, then lg, then rockscout, open youtube and back twice
6-now the final step, open lg, and quickly open rockscout, before it opens get back to the mirrorlink and usb screen
7-click on mirrorscreen and now the phone screen appears.
I hope you succeed