GTC ■ Service ManualASUS Proprietary19華華碩碩電電腦腦4444....5555 SIM Card FailedSIM Card FailedSIM Card FailedSIM Card Failed1. Check Wireless-manager on the WM6, Phone function must be ON =>Operation notice2. Check antenna cover => Assembly issue3. Check SIM socket (CON1) and peripherals => Soldering issue4. Check E-Syren (U17) and peripherals => Soldering issuePhone Off