Frame Pacing for Mobile Devices

Hi!
I had a problem with game being laggy on high end mobile device even tough it was running on 60fps constantly, after some googling I found out it’s because newer mobile phones have refresh rate of 120hz and the difference is causing this effect. So I set fixed framerate to 120fps, on high end device it works perfectly smooth, but now on low end device everything is in slow motion. I found documentation about frame pacing, but it’s not very specific. Has anybody used it? Could you describe how to implement it into a project, I’ll be extremely grateful!