Carriers can customize device models. Generally, it is difficult to determine whether a device supports 5 GHz. The most accurate method is to refer to the device specifications of a specific device model. I’m going to summarize my experience for your reference, but not all device models are as follows. Take the EG8145V5as an example. If the letter corresponding to G is D/Q/U/V/W, the device may support 5 GHz.