Have a customer with an MG21E demo unit. They are unable to get the gateway to connect to AT&T using a sim from another device that was just connected to AT&T without issue. When the SIM is inserted it shows that there is a connection, but the carrier shows up as "Home" and there is no internet connection. When SIM is removed, it's clear that it no longer detects it. Reseating and power cycling do not have any impact. Anyone seen this? SIM is installed, carrier Home no SIM
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