While I realize that this is a little old, from what I've read; the J550 is a 60Hz Monitor.. The J552 is a 75Hz Monitor.. I hope this helps someone in the future.. As long as my info is correct that is...
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Have you tried increasing the sensitivity on your S9 Plus? 1. Go to settings 2. Tap on "advanced settings" 3. Scroll down to "touch sensitivity" option Try also turning off the device for 5-10 minutes with the clear vew cover on I hope that helps
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