Why Am I Limited in Freq?

Why is MT limited in freq on the 5.8 band? I have only 4 to use and my competitor using Trango has 6. I am in the USA and we have a bigger range on 5.8 but I cant use it. I seen a post that mentions extra freq and read the MT doc. When I ask the question on availiability for freq upgrade the posted thread disapeared.

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