A cellular frequency.
Verizon operates it's network on three frequencies right now. 850, commonly referred to as just 'cellular, 1900mhz, commonly referred to as PCS, and 700mhz c-block.
The 850 and 1900mhz networks are Verizon's legacy CDMA/EVDO systems they use for voice and 3G data. 700mhz Block C is the spectrum they bought at auction for LTE usage.
AWS refers to a combination of two cellular frequencies, 1700mhz and 2100mhz. The 1700mhz band is used for upload and 2100mhz for download.
Verizon purchased the rights to and has been rolling out AWS coverage in several of it's larger markets, where it's 700mhz LTE bandwidth may be too overloaded with users.
It's the frequencies used by T-Mobile US.
Correct, but too vague. Even in the US, several companies hold AWS licenses. TMobile just happens to hold the most nationwide. Verizon purchased a ton of AWS spectrum and AT&T still holds some in about a dozen markets or so.
To put it in a little bit of perspective, Verizon spent more on AWS licenses than they did on their 700mhz C purchase. They spent less than 5b on 700mhz C, and spent about 6b on AWS licenses from the original auction in 2006 and the SpectrumCo buyout.