What happens if my fixed internet connection fails on the 4G03?
The 4G03 features automatic failover between Ethernet and 4G connections. If the fixed internet connection fails, the router will automatically switch to a 3G or 4G network, ensuring continued internet access. (Page 3)
From the official Tenda 4G03 N300 Wifi 4G Lte Router manual, page 3
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