Virtual Roaming Systems for GSM, GPRS and UMTS: Open Connectivity in PracticeCărți electroniceVirtual Roaming Systems for GSM, GPRS and UMTS: Open Connectivity in PracticedinArnaud Henry-LabordereEvaluare: 5 din 5 stele5/5Salvați Virtual Roaming Systems for GSM, GPRS and UMTS: Open Connectivity in Practice pentru mai târziu