HUAWEI TECHNOLOGIES CO., LTD.
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4.10.2 Troubleshooting SIM Socket Faults
Card identification problem is usually caused by poor soldering of the CPU or other peripheral
components.
4.10.3 Maintenance Instances
Card identification problem. Measuring VSIM from the pressing down of the startup key to the actual
startup showed no voltage. Replacing the CPU solved the problem .
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