The SIM stores network state information, which is received from the Location Area Identity (LAI). Operator networks are divided into Location Areas, each having a unique LAI number. When the device changes locations, it stores the new LAI to the SIM and sends it back to the operator network with its new location.
Russia Technical Information - In Details. Russia Voltage. The voltage in Russia is 220 V which is the same voltage used in China, Greece, Russia, South Korea, and the United Arab Emirates. 220 V has an advantage over lower voltage such as the 110 V that it is cheaper to transmit.
First of all, the mains voltage is different in Europe and US. In the US, typical mains voltage is 120 V. In Europe, on the other hand, the voltage is typically 230 V. Also, while the mains frequency in Europe is typically 50 Hz, in the US it is 60 Hz. Most devices donât care about the mains frequency.