The sticker is made for GSM mobile phone working frequency from 900 to 1800MHz, without antenna in the world, especial for Nokia i.e, which will flash in red, or blue, or yellow single light, or two or three led flashlights when there is a calling in or out

Customized design can be produced as per your specified requirements, such as LED position, quantity, flashlight colors, logo imprint i.e

Please stick the sticker on the back of your mobile phone, just face on the upper of inner antenna