What you are trying to do (I think) is to use the mobile hotspot as a wireless bridge between two or more Wi-FI devices. The device on its own does not support bridging devices over WiFi. It can work and one of the other users on this community has posted a solution, but it requires additional hardware. http://support.t-mobile.com/message/46384#
Yes, we would like to "bridge" (MAC-2-MAC) devices attached to the mobile HotSpot - in effect using it as one would a wifi "router" with an ADSL or cable connection instead of a 4G connection. The local printer should be accessible to the attached laptops. We are using the device to support Internet and work-group connectivity of a small group working temporarily at a remote site.
Thanks again. From the thread and the article you gave as a reference it appears that the HotSpot device intentionally isolates the access channels as though it were a public access point - and does not yet support a configuration option to change this to support a private network (that seems to ba a future direction).
We probably should have gone straight to a wireless router that supports a USB WAN connection and only requires a simple 4G Mobile Stick. The solution we need does not necessarily have to be mobile in the sense that it has to be packaged in something that fits into a laptop case - although that has advantages, too, for this on-site group Actually, we connect many sites on our network with routers that support GSM/UMTS backup connections - all they require is a SIM card. But that is a different device class.
By the way, I think of the the service as switching rather than bridging - but I'm an old guy. I always associated bridging with connecting bus topologies - connecting bus networks at the MAC level (i.e. yellow-cable Ethernet, TokenRing, etc - if anyone here can remember those technologies . . .) and switching with star topologies.