How do I connect Android devices to a WiFi AP and mobile data network simultaneously? When I turn WiFi on, my 3G connection shuts down, which is fine in most cases. However, I need to connect to a LAN at work that is not connected to the internet and I'd prefer not to lose my data connection when I connect to the work intranet.
How can I keep both connections active?
Ideally, I could limit this desired behavior to this one SSID because I want it to continue to operate with the default behavior for all other WiFi connections.  If that can't be done, prefer a solution that is easy to toggle on and off.
I'm using a Samsung Galaxy Nexus (Verizon Wireless) on CyanogenMod 9.
Despite the wide-spread information of its impossibility, an app named Super Download claims to be capable of this, as you can read in the article Combine 3G 4G Mobile Data + Wifi together to Boost Download Speeds at Geeknizer.



As expected, this comes from one of the XDA developers (elban) -- and, also expected, it requires your device to be rooted (not an issue for you, as you're running CM9;) ).

According to the article, you should keep some things in mind additionally:


Using both connections is not supported on all devices / rom combinations.
Some web servers may provide insufficient functionalities on the requested files.
The Lite version has a filesize limit of 50 megabytes. You’ll have to buy full version to go further. But if you download it from here (using barcode below), its free, with full features, courtesy of XDA).


EDIT: t0mm13b was so shocked that he dug deeper, so I can now add the link to the FAQ of Super Download...