How do I "put my android phone on desktop mode"?

 This method will depend on which version of Android and browser you're using on your phone.  You will find an icon on the top left or right of the words Yahoo Answers.  Some have three dots and others got three dashes.  Click on that and look through those options for desktop.  Click it and you are there.

Look for the Three Lines some where then Press it then Press Desktop

Same answer I gave on your previous question. It depends on your browser. On Google Chrome tap the three vertical dots in Tupper RIGHT corner. Tap that. There should be a desktop MODE option as well as a desktop VIEW option. Tap desk top MODE. On Firefox, there should be a Menu button, three horizontal lines that form a square box. There s should be a Desktop mode option. Tap that. 

Your YA activity profile is public. I saw your question list just before I opened THIS question. A level 5 account should have enough common sense to tap some icons and see what happens. Verizon does not explain of announce changes when they beta test new formats on us except maybe on the suggestion board or Facebook pages.