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I had bought this wireless charger as an emergency backup because I accidentally broke the charging port of my S 10+ I had looked for reviews of the best wireless charging device from Samsung and it led me to this one. When it came, I had to be careful plugging it in, because it seemed kind of a tight fit, but it seemed to work just fine for a week. It suddenly stopped working. As usual, I place my phone properly on the stand, only to find that the LED light doesn't indicate any sign of charging. I've restarted my phone multiple times, turned off and on the NFC setting, the software is up to date, I tried shifting my phone around to see if it would work, removed it's protective case, switched the ends of the cables, and even plugged in the charger in another area, it still didn't work. I switched the cable with my phone's charger: type c to USB, and with it's default 15w adapter box and only then, did the charger respond with flashing red, blue, then yellow when attempting to plug into the outlet. I had to go to Samsung's website to figure out what it meant and it apparently it's on standby mode. Properly inserting the cable, the light changed to flashing yellow and that only indicates a faulty connection between the charger and the phone.
There is nothing in the instruction manual for troubleshooting, or even a reset button.
Update: I realized the charger's cable was the issue. I switched it with the one that originally came with my phone and it functions properly.
I bought today is Samsung 15W Fast Charge 2.0 Wireless Charger Stand and it also charges at 25% every 30 minutes roughly 2 hours for a full charge. It's a little more expensive than the Samsung Qi so you decide on which to buy. You must Set your setting on your phone to Fast Charging in order to get a faster charge. At the end it's way way faster to charge with the original charger the phone comes with. Update it's now a week later and have been charging with the case on it. And it will take 3 hours for a full charge what a hassle taking of the case cover. The Original charger it comes with takes like 1:05 minutes for a 100% full charge. I don't recommend this charger. I'm changing my Stars from 4 stars down 2 stars because it does not charge at well with the case on.
The phone fan does not seem to be working, makes no sound at all which makes me believe fan does not work which is why my phone gets too warm while charging on this Samsung device. This item is way too expensive to have a serious glitch like this, especially using it with a 1200 phone. Would NOT reccommend.
If you charge in the fast modes, there is a very loud and extremely noticable fan chirp if the charger is anywhere near your head (3-5 feet). To reduce the noise you have to manually set your phone to a slower charge mode in your phone settings. Still some fan chirp even in the slowest charge setting. I also got the Yootech charger which is $15 instead of $70, works the same, no fan noise, no lights, 100% satisfied. I now have two of them.
After the first couple days I noticed that I can hear something clicking inside of the device everytime my phones on it charging... Actually it's kind of loud and make something great rather disappointing... I got another, but I don't know if this is on all models or just mine.
This Samsung wireless charger looks nice, fan may annoy some. The original wall charger that came with my Note 9 charges much faster. Very disappointed to say the least. Will definitely be returning for refund.