4. GSM - Global System for Mobile Communications - TECA ELIS
Cisco AS5850 Universal Gateway Regulatory Compliance and Safety Information - Cisco Systems
MongoDB CRUD Operations — MongoDB Manual
A3880032 GSM 850/900/1800/1900 GPRS / EDGE / UMTS FDD1&8 HSPA mobile phone with Bluetooth, WLAN, A-GPS, FM receiver User Manual Sony Ericsson Mobile Communications AB Sony Mobile Communications