Default Best place to purchase white T-Mobile LTE model?

Looking to find a place that carries the T-Mobile US LTE capable (model number?) Z Ultra in white. Anyone here have luck locating this phone?

I found this seller on Amazon.com: http://www.amazon.com/Sony-C6833-Unl...cm_rdp_product

Assuming this phone will only work in T-Mobile areas which have been refarmed?

LG Optimus L70 Black

BlackBerry Z30 LTE STA100-5

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