Thank you for your response I am still not able to get my rut240 online. I can't think of any configuration change I made recently and as of now I have installed new firmware RUT2_R_00.07.01.2 and wiped all settings to default.
I am able to use cellular data from this sim card when I put it in my mobile phone I turn off wifi the cell connection works immediately.
I am using auto APN feature
When I input cat/tmp/resolv.conf.auto into the CLI it returns:
-ash: cat/tmp/resolv/conf.auto: not found
Still disconnecting from cellular. If you have any other ideas please let me know. Thanks for your help Med!