The Mifi S1 may have been flashing red for a number of reasons:
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1. Low battery: When the battery is too low, the Mifi S1 will flash red light as a low battery warning. At this time, you need to charge and wait for the power to recover.
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2. Weak signal: If the wireless signal around the Mifi S1 is weak or there is no signal coverage, it will also flash red. Try to move the device to a position with good signal, or change the position to get a better signal.
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3. SIM Card issues: Check that the SIM card is correctly installed on the Mifi S1 and that it is activated and correctly matched with your device. Sometimes, SIM cards may fail or need to be replaced.
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4. Equipment failure: If the above solutions have no effect, then it is likely that the Mifi S1 itself has a failure. In this case, it is recommended to contact the manufacturer's customer support for further assistance or to schedule repairs.
On behalf of the red light, now the network is not normal, there is no WIFI transmission in the fault alarm state or insufficient power, to charge in time