You implicitly subscribe to this.
700Mhz, 850Mhz, 1900Mhz, 2100Mhz, 2500Mhz. Being part of contemporary civilization requires basking in a wondrous variety of electromagnetic radiation that endows constantly connectivity. This landscape of connectivity lies on the periphery of your awareness: microwaves pierce walls (even bodies) in search of antennae to decipher them; cellular towers propped auspiciously on things above the ground remain largely nondescript.
Source: ISED. Data generously provided by Loxcel Geomatics.