What are spectrum frequencies?

They are used for television broadcasting, cell phones, satellite communication including GPS, personal radio services including Wi-Fi and Bluetooth, walkie-talkies, cordless phones, and numerous other applications . The IEEE defines the UHF radar band as frequencies between 300 MHz and 1 GHz.

Spectrum refers to the invisible radio frequencies that wireless signals travel over . Those signals are what enable us to make calls from our mobile devices, tag our friends on Instagram, call an Uber, pull up directions to a destination, and do everything on our mobile devices.

In the Philippines, telcos operate in Band 28 (700 MHz), Band 5 (850 MHz), Band 3 (1800 MHz), and Band 1 (2100 MHz) to offer 4G services nationwide.