First of all: If you carry out this procedure you invalidate your warranty completely!
This applies to K3765 Huawei build ONLY and NOT K3765-Z as the latter is a ZTE device.
OK the K3765 isn't a bad device but if like me you hate Vodafone Mobile Connect (VMC) and would rather have Huawei Mobile Partner actually installed on the device, here is the procedure. Oddly, the K3765 will not work correctly with a PC installed copy of Mobile Partner in its native K3765 state!
On no account should you just install a Mobile Partner update to the device at this point! It seems that Vodafone have "customised firmware" that can basically "brick" the device if you go this route - be warned!! I have had various feedback on this but I don't want to sacrifice a modem just to test that the warning is correct - It came from several reliable sources!!!
First we need to upgrade the firmware to V11.126.13.00.00.B418 but this is for the Huawei E1762 unbranded version of this K3765. This takes about three minutes and unless you are outside of South Africa you will not require a Flash Code - If you do please feel free to PM the IMEI of your K3765.
E1762 Firmware is here: http://www.dc-files.com/files/huawei/modems/K3765/ download ONLY the Firmware Update to E1762 from this section!
To update the firmware you will need to ensure that VMC is closed completely - No red icon should be showing in the tray. If you have access to a laptop with a good battery, I would suggest using this for the upgrade unless you have a UPS attached to your PC.
Once done you can check that all is well by using the modem before you proceed to the next step. VMC will now report the device as a E1762.
Now we update the dashboard: http://www.dc-files.com/files/huawei/modems/E1762/ choose Dashboard Update.
Once the dashboard update is done, it will try to install Mobile Partner... I suggest (from experience) that you cancel this operation, un-install VMC via Control Panel and reboot the PC. Now let the modem install Mobile Partner and afterwards I suggest that you reboot - I know you probably don't need to do this but I never get grief with drivers not loading doing things this way!
Sadly the Mobile Partner version on the device is 11.302.09.00.03 which doesn't have USSD facilities. You can now install a later PC installed version of Mobile Partner 16.001.06.01.500 for example. However, this gives the annoying problem of the modem trying to re-install from the device but there is a simple fix:
In your Mobile Partner folder locate the file SysConfig.dat file. Change the file attributes away from Read Only so you can edit it. Notepad will do the job nicely!
Look for the following section in the file:
L_REG_PATH=SOFTWARE\Huawei technologies\Mobile Partner
Edit the last line in this section so that it matches the above and save. When the modem is not plugged in or reset, your system now reports that the correct version is installed even though you really have say 16.001.06.01.500 installed.
Again you will void the warranty on your device if you carry out this procedure. I have tested this on a few K3765 including the one that I'm using now!
If you find this procedure complex or confusing then leave things as is or ask a knowledgeable friend to undertake the task for you!!