I have been having a d-link router which I share internet to from my build box on which i plug the zte mf192 modem (the d-link has no usb).
So today i got this new tp-link MR3420 and i have to say it looks gooood :-). it supports 3g, and 4g via usb, not sure i will ever use 4g. Among these features is a local wireless HD video sharing capability, with speeds up to 300Mbps.
This costs Kshs 4,000 in an electronics shop at Nakumatt Lifestyle building. Here are some pics:
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This router is supported by OpenWrt. see the wiki and the usb stuff you could do which includes mounting filesystems and sharing files, streaming usb audio source and tethering to and from a smartphone. It sounds all interesting to try 😉
and here is a youtube video: