Put it below the button on the cellphone, as the picture shows. When there is a phone call, the LED will flash.
1.Welding ( The red remark stands for two Soldering joints of one component. We have marked the "cathode" and the "anode" in the PCB board.)
2.Can not cut the pin of the diode
3.The "ladybird PCB" needs to weld with two pcs of 5CM "antennas"
4.The best positon for this kit is below the button on the cellphone, where the cellphone has the strongest radiation effect.
5.Just work with the GSM mobile phone.
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