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The 3rd-gen iPhone will be out in June. There will be no cell data improvements, but there will be improvements to software and all the other hardware left alone at the last update such as the battery, potentially the camera, and maybe Nike+ integration, as well as improved Bluetooth functionality that software can't add.

The next iPhone isn't about getting us better speed, because there IS no better speed. The idiotic telecoms haven't even finished 3G everywhere yet.

Apple will give us the updates they wanted to give us last time, next.

If anybody wants to see why moving past 3G isn't a huge deal, take a look at AT&T's 3G coverage. Then take a look at the EDGE coverage. Where I may be moving soon is outside the 3G area, so I'm really wanting AT&T to work on the 3G coverage area instead of something faster.
 
If anybody wants to see why moving past 3G isn't a huge deal, take a look at AT&T's 3G coverage. Then take a look at the EDGE coverage. Where I may be moving soon is outside the 3G area, so I'm really wanting AT&T to work on the 3G coverage area instead of something faster.

That's because setting up a new EDGE network is much cheaper (because EDGE works with the same hardware as GSM/GPRS and is only a software update) than setting up a 3G UMTS/HSPA network (which requires new hardware, software and feeding lines to the cell tower).
 
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