Unhappy [Q] LG Optimus G Pro E988 band frequency problem

Hi everyone, I just bought a LG Optimus G Pro E988 in asia, and now i am living in a country of central america that dosent support 3G 900/2100.
In this country only supports 3G WCDMA 850, and this have to thank to this great website to made me bought this version gsmarena.com/lg_optimus_g_pro_e985-5254.php the specs of this site is wrong !!!

So, i wanna ask you guys kindly, if I can do anything to change my 3G 900/2100 frequency to 850mhz ?

Thank you very much !