UPDATE! FIX FOUND! Follow the following steps carefully: 1- Make sure your port is dry; 2- Turn off completely your phone; 3- Plug-in the charger until the charging icon appears; 4- Turn on your phone (try to not touch or move the cable); 5- Let your phone charge for about 30min; 6- Disconnect the charger (the moisture notification should not pop-up again) ---------- If that doesn't works ---------- 7- Repeat the process 1, 2, 3 and 4; 8- Quickly disconnect and connect the charger (the notification shouldn't pop-up in the middle of the process) 9- Let the phone charge for about 15min; 10- Disconnect the charger (the notification shouldn't pop-up again anymore). ---------- If none of that works ---------- 2 options: 1- Backup all your data and Factory Reset your phone; 2- Reset the settings: (Settings -> General Management -> Reset -> Reset Settings).
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IT'S PROVED! IT IS A SOFTWARE ERROR! - My phone (Galaxy A3 2017) has been in direct contact with water many times on pools and etc and (obviously) that notification "Moisture Detected" shown up, but after the port was dry it would simply disappear. But 1 week ago I updated my phone to the last Android 8 Oreo and one day I woke up, disconnected the charger and that notification appeared! I thought it was probably a normal thing so I just waited for it to disappear, bit since then it never disappeared! So I tried to dry the USB type C port, clean it with alcohol, drying it with the hairdryer and NOTHING! !! - Thats when I tried to put some water on the port just to see what would happen, and guess what... The notification showed up again! The notification ringtone sounded again! Even though the notification was already there! Which means that the notification was just a BUG, and when I really puted some water on the port it sounded again, because this time it really was with moisture! !!! --> Concluding, THIS IS A BUG CAUSED BY THE MOST RECENT FIRMWARE UPDATE AND IT IS ONLY POSSIBLE TO SOLVE BY DOING A FACTORY RESET OR BY INSTALLING THE UPDATE AGAIN WITH ODIN. - If this clarified you please let me know! Good Luck!
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