What is the frequency of mobile gprs module?

Global System for Mobile Communications, abbreviated as GSM, is a digital mobile communications standard developed by the European Telecommunications Standards Organization ETSI. Its air interface uses time division multiple access technology. Since it was put into commercial use in the mid-1990s, it has been adopted by more than 100 countries around the world. GSM standard equipment accounts for more than 80% of the current global cellular mobile communication equipment market. Since GSM is the second generation mobile communication technology compared to analog mobile communication technology, it is referred to as 2G.