Assuming that your location has very weak Globe signal and that you your place is not built where signals could not penetrate:
Assuming also that Globe does not have any intentions of putting up a cell tower within your vicinity in the immediate future:
A recourse is to have Globe install a femtocell which they call "Airboost" which is a a small, low-power cellular base station, typically designed for use in a home or small business. It picks up the signal of your devices and courses them through a DSL connection which is one of the prerequisites before they are able to install one. Bottomline is that you have to have a DSL connection (at your own expense) before they can make it work..