All smartphones have GPS now, but those with GPS can access up to 27 satellites when in use, but in reality no more than about 4-5 are ever used because your phone can not access all the satellites due to your location.
A minimum of 3 is needed to get a good position and accuracy but the more the better and in built up areas and where more people are using GPS more demands are being put on the system so Qualcomm, the manufacturer of processors for smartphones have come up with a chipset that allows for a more accurate position to be gained using GPS and GLONASS, a Russian designed equivalent to GPS.
The Galaxy Note is one of the first UK devices to take advantage of GLONASS.
Therefore phones with the Qualcomm chipset will use either system and work together to determine your position. Therefore you may have access to 2 GPS and 2 GLONASS satellites to give you your position where in the past you may have had 3 or 4 GPS satellites.
The following video explains how the technology works in plain simply English. Well worth a watch and its is fantastic to see that even a mature system like GPS is still evolving.