Anyone same problem about b312-939, gamit ko bandwith 40 kahapon biglang nag down, as in no connection even ilipat ko antenna, band 41 sobrang bagal, band 3 total dead, posible sira kaya c router or sim? currently using band 28 but destination net unreachable, na try ko na din mag change dns and reset wala talaga. btw im using admin tool by sir Chris Laconsay