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Somoff 4CH Switch not working

My Sonoff 4CH Switch is not working. I tried to use the 433 Mhz remote it just blink green light. I tried to reload my internet but no network indicator. What should I do. The old firmware was working well. The old firmware, the schedule, and remote is working offline until the 3.3.0 firmware update install and it is not working properly.
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