Check SIM Card orientation by notch.
Make sure SIM Card is in Tray securely.
Holding handset held level, press Tray in straight
SIM Card is inserted.
Check Tray orientation.
Press firmly where circled ○, and make sure there is no gap between handset and SIM Card/SD
Card Slot Cover.
Removing SIM Card
Always unmount SD Card beforehand.
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