The 4g modem Huawei E398 has erratic behavior under Ubuntu 13.04, it has two different behaviors:
First scenario:
The modem is pluged and recognized as:
Bus 003 Device 010: ID 12d1:1506 Huawei Technologies Co., Ltd. E398 LTE/UMTS/GSM Modem/Networkcard
A virtual CD is mounted and the system offers to run a autorun program, is this case, the CD is mounted as "VIVO INTERNET", a brazilian carrier.
After a few seconds the mobie broadband connection appears at network manager menu and its possible to connect to the network.
Second scenario:
The modem is pluged and recognized as:
Bus 003 Device 002: ID 12d1:14fe Huawei Technologies Co., Ltd.
A virtual CD is mounted, but its umounted right after. The icon disapear a second later after appear.
No option appears at network manager menu and its not possible create a connection.
To fix this the modem must be removed and reconnected a few times until it start to work.
Status changed to 'Confirmed' because the bug affects multiple users.