Unlock Lte Bands On Redmi Note 3 Mtk

[joaojacinto]

Hi everybody.
I Like a lot my RDN3 MTK, but there are one or two issues with it. One off it it's the limitation of the LTE BAND.
Because in China, they don't use band 20 (and others), all bands not used there are locked, and i don't see Xiaomi unlock them .
So i did a surch on Google, and found this (

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) but Because i am a newbie, i would like to know if anyone already use it or if it is possible.
Best regards,
João Jacinto