How to make FX30 auto data connect (4G)

Hi all, here my situation
I just call le_data_Request in my program at startup. It was just fine and no problem at all. But after running a few days, I found that my connection was lost in my server. I checked in FX30 via terminal found that data connection was lost. And I tried to connect using cm data connect in terminal and didn’t work. After restart FX30, everything is fine. Don’t know what is the problem. So, is there any way to maintain data connect all the time.

You should receive network disconnect callback, after that you can do an offline sequence, then you can establish data connection again.

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