Fault code 123

Fault code 123
Symptoms
Network connection failure -Subscribed QoS rejected by network. Please modify parameters and try again.

Causes
Network connection failure because the requested QoS was rejected by the Network.

Troubleshooting and Resolution
Modify the QoS settings and try again. If the problem continues, set all QoS settings to the default values and try again. If the problem continues with the default values, contact your Service Provider.