Advantages of GSM

Few Advantages of GSM over other:
1.Less signal deterioration inside buildings.
2.Ability to use repeaters.
3.Talktime is generally higher in GSM phones due to the pulse nature of transmission.
4.The availability of Subscriber Identity Modules allows users to switch networks and handsets at will, aside from a subsidy lock.
GSM covers virtually all parts of the world so international roaming is not a problem.
5.The much bigger number of subscribers globally creates a better network effect for GSM handset makers, carriers and end users