Ключевые слова: background, business, call, card, cell, cellphone, cellular, chip, choose, close, closeup, communication, computer, connection, digital, electronic, equipment, group, gsm, handy, information, isolated, macro, many, micro, mobile, network, number, object, operator, over, pay, phone, plug, prepaid, reception, red, security, service, sim, small, smart, smartcard, talk, technology, telecommunication, telephone, telephony, white, wireless,