How to get frequency band in which device getting signal from operator? I have to find the frequency in which device is working currently. Ex: My device is connected with ABC network which is 4G and run on 2100MHz or 1800MHz, So I want to know the frequency(i.e. 2100MHz or 1800MHz).

Please share your experience Which will help me to find the frequency band. But guys I don't wanna to know the network type. Is there any way by using reflection Please share.
Dial *#*#4636#*#* then select phone information.