Advantages of 2G GSM
- GSM is mature; this maturity means a more stable network with robust features.
- Less signal deterioration inside buildings.
- Ability to use repeaters.
- Talktime is generally higher in GSM phones due to the pulse nature of transmission.
- 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.
- The much bigger number of subscribers globally creates a better network effect for GSM handset makers, carriers and end users.
- Pulse nature of TDMA transmission used in 2G interferes with some electronics, especially certain audio amplifiers. 3G uses W-CDMA now.
- Intellectual property is concentrated among a few industry participants, creating barriers to entry for new entrants and limiting competition among phone manufacturers.[citation needed]
- GSM has a fixed maximum cell site range of 35 km, which is imposed by technical limitations.[2]
