I searched every single page that talks about hw550-3g and I haven't found a target profile for my device.
I have doubt about the patch you mentioned because it seemed to me (reading mailing list) it was added in trunk and I taught it was outdated (it is 7 months old).
I'll try to apply the patch anyway hoping not to brick the device...
Do you know where I can find a list of basic packages I have to include before building final image?
UPDATE:
I built the image successfully. It is 3.3Mb and have LuCi and other basic stuffs included. Stock upgrade firmware functionality doesn't work, I'm trying to figure out how to flash the openwrt with alternative systems.
(Last edited by erriko on 29 Sep 2011, 19:02)