iPhone 5 is the topic in town and in the web. Last Wednesday, Apple unveiled the new iPhone 5 that support 4G wireless technology or Long Term Evolution (LTE). Now, telephone companies are forced to maintain 2G, 3G and 4G simultaneously to support the non-tech savvy customers :)
In 5 to 6 years from now, 3G is target for shutting down (gradually).
So, for 3G customers, you'll feel some bump on the services while 4G will have a network congestion issues that they have to seriously look forward before everybody get's into 4G.
Again, can't wait for iPhone 5