Today, I had written about unlocking procedures of MobiiBroadBand 3G (E3131) Modem Dongle DataCard in this article. Today, I got the dashboard software and firmware update also for MobiiBroadband 3G (E3131) modem dongle, which download link is provided at the end of the article. As you know that latest software and firmware comes with various errors fixed on it. So, I recommend to use the latest software and firmware update to get rid of previous errors. 
Huawei E3131 Modem

Huawei E3131 Modem

How to update the MobiiBroadband 3G (E3131) Modem Dongle Dashboard Software : Just disconnect from the internet and close the default MobiiBroadband 3G (E3131) Modem Dongle Dashboard Software of the modem and then run the downloaded MobiiBroadband 3G (E3131) Modem Dongle Dashboard Software update and after a few minutes your modem dashboard software will be updated.
 
How to update the MobiiBroadband 3G (E3131) Modem Dongle FirmwareJust disconnect from the internet and close the default MobiiBroadband 3G (E3131) Modem Dongle Dashboard Software of the modem and then run the downloaded MobiiBroadband 3G (E3131) Modem Dongle Firmware update and after a few minutes your modem dashboard software will be updated.
 
Note : Firmware update may ask password. Comment below your IMEI to get the firmware update password of your MobiiBroadband 3G (E3131) Modem Dongle.
 

Download MobiiBroadband 3G (E3131) Huawei Firmware E3131Update_21.158.00.00.1020.B757.zip