is there a LTE Multiple Band enabling tweak?

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http://forums.androidcentral.com – I got the 32gb unlocked US Version of the HTC One, on specs it says LTE 700/850/AWS/1900 (US) - is this for US LTE only or other countries using these bands will also have LTE on the phone? to my main question, is there a tweak or something to enable LTE 1800 or other bands on my phone? or is it a hardware issue? (HowTos)