Sadly my phone just kept falling off of it (HTC one X). I cleaned the adhesive pad as per the instructions, cleaned the back of my phone and it still fell off! Even pressing the phone on as hard as I dare without damaging the screen made no difference. The phone clung on for about 10 minutes then ended up in the foot well of the car. I didn't even attempt to connect the phone to the car charger so as not to add any weight to the phone. I was really disappointed by this as all the other reviews and you tube videos seem to contradict my experience (which is why I bought it in the first place).