Part of the problem is the huge percentage of the float that is shorted (14.4%), but the main problem is the fact that TSTC has not revealed any demonstrateable 4G technolgy or just has none, IMO.
TSTC's financial reports allude to a desire to enter the 4G market, but do not indicate TSTC can provide 4G networking.
And, in fact, TSTC's annual report appears to admit such:
"Our research and development efforts may not yield new wireless coverage products that are readily deployable in 4G networks."
Based upon the statements in the financials, TSTC's "Unified Local-Access Solution" or WFDS solution sounds more like a big router than any type of broadband network, infrastructure, backhaul, last mile, middle mile, or any other delivery service that is not already provided to the point of service.
Whatever product TSTC provides, it is very small scale, IMO.