There are phones that are Quad Band UMTS/WCDMA, iPhone 4 for example is 850/900/1900/2100. Also believe Galaxy S II does aswel.
But yes as stated above someone has clearly copy and pasted from somewhere like GSM Arena. That listed all available specs.
If won from Subway then it is 850/2100 and will have Froyo 2.2 as it is a Telecom Device, you can use it on 2degress or Vodafone but you will typically only pickup 2G GSM Reception.
Using a non 850 WCDMA/UMTS device on XT will result in only getting coverage in some main city centres as it will only pick up the 2100 frequency (if supported). Typically these can not be unlocked to support 850 as the hardware/chipset simply does not support it anyway, no rooting, or different rom's will change your hardware specs.
People should really refer to the FAQ's in the Telecom XT sub forum, the answers are all there regarding frequency's





