Why can't the phenyl cation be stabilized by resonance?

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Ashu2912
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In my book, it's written that the phenyl cation can't be stabilized by resonance. I can't think of any reason why this is so. All the conditions for resonance are satisfied : all carbon atoms lie in one plane, all possible canonical structures will have the same number of unpaired electrons, we'll only move the pi - electrons.
Also, I think that the carbon atom having positive charge must be sp - hybridized, as per the orbital diagram, but I guess even that is incorrect. Can anyone explain this?
 
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Try drawing out the resonance structures.
 
The only way to rearrange a phenyl cation would be a hydride shift, which is unfavorable.