Device saves to memory last seen operator and its’ network type. When there is no operator attached, the device tries to attach to last seen operator on 4G IoT network mode. If the connection fails, device clears last seen operator from memory and starts new operator search. Same sequence happens when preferred operator is given (configured), but instead of clearing operator, device each time connecting first tries to connect to preferred operator.
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The device saves to memory last seen operator and its’ network type. When there is no operator attached, the device tries to attach to the last seen operator on 4G IoT network mode. If the connection fails, the device clears last seen operator from memory and starts a new operator search. The same sequence happens when the preferred operator is given (configured), but instead of clearing the operator, the device each time connecting first tries to connect to preferred operator.