2 options. The easiest is download netmonitor sa google play. Check ano ang may magandang signal sayu (check tutorials sa YT paano maidentify, The lower the dbm the better.). Or another way is Isa isahin mo po. Meaning disable or untick all but one, speed test, if mabagal, try another. Rinse and repeat. Yes matrabaho sa una, but once ok na goods na yan.