Swith SIM. Adjust the switch to any of the three ABC gears to be used. The operator to be tested simultaneously pulls out the entire test deck and pushed it in to re-detect the new operator.
4. There is a nano sim card pin test point on the test card deck, which is convenient for repairing the mobile phone without reading the card for quick detection. When testing the signal of SIM card at the test point, it is necessary to turn off the phone and measure the ground resistance. When the phone is