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Restarting a 3G Modem Manually
Context
A 3G modem restarts automatically when it detects an exception. If the 3G modem cannot restart automatically, restart it manually.
The SIM, USIM, or UIM card is not hot-swappable. To ensure that the SIM, USIM, or UIM card works normally, restart the 3G modem manually after hot-swapping the SIM, USIM, or UIM card.
You can run the display cellular command to check whether the SIM, USIM, or UIM card is working properly based on the SIM Status or UIM Status field.