I have this LG G3 Stylus D690 Dual sim mobile phone, that I just got and like very mch. I have been able to root and install TWRP recovery on it. MY problem now is trying to upgrade or install a custom rom on it. I was trying to get Marshmallow 6.0.1. It currently has 5.0.2 on it. I have not been able to update it using LG PC suite. Any help would be greatly appreciated. I have searched XDA, online search with google.
Thanks very much.