There is a possibility that Cradlepoint has something that MIGHT work.
PHS300 Personal WiFi Hotspot | Cradlepoint Technology
They do claim it works with certain BlackBerry models. 9700 is not listed. My plan is to use this with a AT&T USBConnect Lightning and pull my sim from the 9700 to put into the USB stick. Will it work? Dunno. All the pieces are in transit as we speak.