①
A Standard GSM SIM Card needed，do not support CDMA2000；
NOTICE
②
GPRS
of Sim Card must be opened；
Traffic, SMS, Calls and other SIM card service fee charged by operators;
③
Positioning / Remote Power off / Remote command fucntion rely on
the network of base station. Device may not work well if the network
signal is not very good;
④
Product should stay away from fire, high temperature, heat and other
extreme environments;
SIM
Micro SIM
Nano SIM
CDMA2000
WCDMA
GSM
