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After following all steps given above, charging issue still remain the same. Actual issue is that time shown on display is inaccurate. when you attach phone with charger, it says full charge will be done in 1 hr 10 mins. But. when you actually calculate the time, it takes 1 hr 30 mins and more. So I would suggest all S20+ users to take a screen shot at starting of charging and end of full charge to find out. I think Samsung screwed up big time and this could be some sort of scam to misguide users about full charging time.
