hi all,
just in case, might be interesting to some of you -- here I described a process of building a Linux box with 3G connectivity for remote management, network tests, VPN fallback, and so on. The box has also the possibility to add a WiFi adapter with an antenna:
http://txlab.wordpress.com/2014/06/20/3g-connectivity-for-pc-engines-apu/
cheers, stan