Spectrum Global Solutions, Inc. (OTCMKTS:SGSI) (f.k.a. Mantra Venture Group, Ltd.) is the holding company for next generation technology companies specializing in Telecommunications across the US,
Spectrum Global Solutions, Inc. (OTCMKTS:SGSI) (f.k.a. Mantra Venture Group, Ltd.) is the holding company for next generation technology companies specializing in Telecommunications across the US,