It works perfectly and lowers the temperature of the phone, it has a magnetic sticker that you stick on the phone and I can say it is strong, it even works through the phone case. Also, I should mention that it cools excellently, it's not just blowing air, it really does the job. I used it at the beginning of September when it was still hot. The only negative is that, according to an app I saw on the phone, it consumes quite a lot of power, so you should use a power bank or charger instead of connecting it directly to the phone for power, because it will drain your phone's battery