On some or all of the 2SS models they come with a wireless phone charger that appears to attach to the rear of the center console. My phone fits and stays pretty good. I have a Samsung Galaxy S8. It sounds like you have a bigger phone.
You might be able to buy just that piece. If you 3D print one, you could custom fit your phone so it holds your phone perfect. Just another option. On the attached image I circled the piece I'm talking about.
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