In case of power failure or when there is no available external power
supply, the router cannot work.
2.5 About the USIM Card
Avoid handling the USIM card unnecessarily. Hold the card by the
edges to prevent static damage. Keep the USIM card away from
electrical and magnetic appliances.
If you cannot get service, make sure that：
You are in an area which has network coverage.
You are using the correct USIM card.
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