Playing along at home, I got my approach to work on my Samsung Galaxy S7. Two minutes before I clicked into FOM, then let the phone go to sleep. At 10 seconds 'til, I brought up the clock ticking in seconds, and at 8:00:00 I unlocked the phone with my fingerprint. The screen appeared with a grey button, but then refreshed and showed red almost immediately.
I was also able to click into My Status and get an active button.
Not sure if there is a speed benefit over sitting on the home page, since I was using my fingerprint to unlock it took a second. Perhaps if I take the lock off so I can just swipe the screen it will be faster...but I still think best practice for my phone will be to sit on the front page and tap FOM at OPO.