Chart produced by GSA confirming the main spectrum bands which are currently used in 537 commercially launched LTE and LTE-Advanced networks worldwide.
Source of data: GSA Evolution to LTE report published October 26, 2016
1800 MHz (b3) is the most widely used contiguous band in 4G/LTE commercially launched systems deployments worldwide. The second most popular contiguous band is 800 MHz (b20), followed closely by 2.6 GHz (b7) then AWS (b4).
Band 40 is the most commonly used spectrum for LTE TDD deployments.
This chart may be downloaded as a JPEG or PDF file.