Hello there,
We recently have purchased the new RUT241, and we are having problems to configure Mobile connection.
In older ones like RUT5XX, RUT23000XXXX, RUT23001XXXX or RUT9501410O0, the configuration was like following snapshot.

But now, in the new RUT241, the configuration has changed and we have tried different setups but any of them has worked out.
First configuration
INTERFACES: MOB1S1A1 -> GENERAL SETTINGS
Protocol: Mobile
Mode: NAT
PDP Type: IPv4
Auto APN: off
APN: -- Custom --
Custom APN: private_apn.com
Authentication Type: CHAP
Username: username
Password: password
INTERFACES: WAN6 -> GENERAL SETTINGS
Protocol: PPPoE
PAP/CHAP username: username
PAP/CHAP password: password
Access Concentrator: auto
Service Name: auto
Second configuration:
INTERFACES: MOB1S1A1 -> GENERAL SETTINGS
Protocol: Mobile
Mode: NAT
PDP Type: IPv4
Auto APN: off
APN: -- Custom --
Custom APN: private_apn.com
Authentication Type: CHAP
Username: username
Password: password
INTERFACES: WAN6 -> GENERAL SETTINGS
Protocol: Mobile
Mode: NAT
PDP Type: IPv4
Auto APN: off
APN: -- Custom --
Custom APN: private_apn.com
Authentication Type: CHAP
Username: username
Password: password
Mobile status indicates the following:
IMEI: xxxxxxx
SIM card state: inserted
IMSI: xxxxxx
ICCID: xxxxx
Operator: N/A
Operator state: denied
Cell ID: N/A
Data connection state: Disconnected
Connection type: 4G (FDD LTE)
Signal strength: -87
Carrier Aggregation: Single
Connected band: LTE BAND 3
RSRP: -121
RSRQ: -14.0
SINR: 6.3
Bytes received: 0 B
Bytes sent: 0 B
What parameter are we missing?