Have you looked at the User options in 'My Profile'? It's certainly not the same as optimizing for mobile, but you can choose to disable display of images and avatars, which should simplify the pages being displayed on your mobile, and perhaps speed things up a bit.
My 2003 Vibe Base Auto 2-tone Salsa "SalsaWagon" was built in May 2002. I acquired it in Feb 2004/Traded it in on a 2016 Honda HR-V in Feb 2018.