Share to: /   The Chinese make light Work of Payment: The Invention of Paper Money   / Around 650 AD, the emperor of China began to issue paper value tokens for general use.
Answer: No. Mobile phones do not give off sub-atomic (ionizing)  radiation.    Answer: Yes. Mobile phones emit microwave (millimeter to  centimeter range) electro-mag â¦ netic radiation, mostly at frequencies  from 800 to 1800 MHz (1.8 GHz).This is below infrared.nswer: No. Mobile phones do not give off sub-atomic (ionizing)  radiation.    Answer: Yes. Mobile phones emit microwave (millimeter to  centimeter range) electro-mag â¦ netic radiation, mostly at frequencies  from 800 to 1800 MHz (1.8 GHz). This is below infrared.
In your Android smartphone, the strength of mobile Internet signal is shown using alphabet letters G,E,2G,3G,H and 4G near the signal bar. Have you ever wondered about the meaning of these symbols/letters? Well, today I will tell you about the meaning of letters G,E,2G,3G,H and 4G in the context of the mobile Internet. MEANING OF 'G' IN MOBILE SIGNAL. Letter G stands for GPRS (General Packet Radio Service). It indicates the slowest speed of internet data transfer in your mobile phone. When you see G near your signal strength indicator, it is certain that your net connection is working at the slowest speed.