I have RUTX09 and using one data sim card.
When I set "auto apn" or set custom apn which is the same as the "auto" one, everything is working fine.
When I set other custom apn (I use custom apn for public static IP address), it connects to the provider on 3G, but data is disconnected.
Sometimes it's connects, buts it's very rare. I tried the sim card (using custom APN) in smartphone and also in other cheap 4G modem and everything worked fine.
I did all firmware and modem updates.
Now I have RUTX_R_00.07.03.1 and EG06ELAR04A08M4G.
I've attached also troubleshoot file. What can be the problem ?