There are European retailers start to list the HTC Proto at their catalogue and we can see the HTC Desire X name there. Besides that, the European retailer also listed the model number of the HTC Desire X / HTC Proto - 99HSP015-00.
With more than one retailer named the HTC Desire X as the HTC Proto.
We can almost confirm that that would be the official name of HTC Proto. However, there are no information yet on the HTC Proto / HTC Desire X. [Source]
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