True po.. Wala pa kasi akong narinig na ganun ehKuya maski may LTE sim ka, kung yung modem mo di kaya ang 4G/LTE, the best that can happen is max 3G speed lang ang makukuha niya. There is no plausible way to upgrade the modem to LTE unless you do a hardware change...in other words, bili ka ng pinaka bagong modem