Hi KBOYLE,

yes I've looked for errors in /var/log/messages, /var/log/warn without any result.

There are no errors in the log files.

I wanna mention I have two clean installed OSes on VMware - SLES 11 SP3 and SLES 11 SP4.

I faced this problem on SLES 11 SP4 but SLES 11 SP3 working good.

Also the USB modem detection differs on OSes

SLES 11 SP4:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 002: ID 0e0f:0003 VMware, Inc. Virtual Mouse
Bus 002 Device 003: ID 0e0f:0002 VMware, Inc. Virtual USB Hub
Bus 001 Device 003: ID 12d1:1506 Huawei Technologies Co., Ltd. Modem/Networkcard

SLES 11 SP3:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 004: ID 12d1:1506 Huawei Technologies Co., Ltd. E398 LTE/UMTS/GSM Modem/Networkcard
Bus 002 Device 002: ID 0e0f:0003 VMware, Inc. Virtual Mouse
Bus 002 Device 003: ID 0e0f:0002 VMware, Inc. Virtual USB Hub

I'm using the same USB modem - HUAWEI E303