telecommunications carrier; PTT
sole proprietor; one-man business; self-employed
independent power producer; IPP
mobile network operator; MNO; wireless service provider; mobile network carrier
virtueller Netzwerk-Betreiber; virtueller Netzbetreiber; virtueller Mobilfunkbetreiber; (engl.) Mobile Virtual Network Operator; MVNO
Telekommunikationsunternehmer
general contractor; main contractor