Installing Instructions: Step 1, Clean the surface of the phone or phone case, dust and wetness may reduce stick power. Step 2, Peel off the film covered upon adhesive and stick phone ring on your phone or case. Step 3, Press to ensure adhesive firmly and fully stick on the phone or case for seconds. Step 4, Rest it 24 hours and then you can freely use it. Most Important: Please don't try to pull/spin the ring holder immediately after applying!