Ключевые слова: abstract, background, black, business, call, calling, card, cell, cellphone, cellular, chip, close, closeup, communication, computer, concept, connection, contact, dial, electrical, electronic, electronics, equipment, global, gsm, hand, identity, internet, key, macro, message, metal, metallic, mobile, modern, number, operator, phone, security, service, sim, simcard, smart, sms, talk, technology, telecommunication, telephone, white, wireless,