What is iRAT (inter-Radio Access Technology)?

IRAT represents Inter Radio Access Technology. RAT can be either GSM,CDMA,WiMAX,LTE,TD-SCDMA or some other remote innovation used to make air interfaces portable to get different services. The inter-Radio Access Technology is the physical connection strategy for a radio based communication network. Many modern mobile phones support several RATs in one device like Bluetooth, Wi-Fi, and GSM, UMTS, LTE or 5G NR.