What's missing on the iPhone 4?

An unlimited data plan that can be used with tethering. Apple does not allow this, although with a jailbroken device, you can purchase MyWi and turn the device into a mobile hotspot. If you still have an unlimited data plan, then you will be able to tether with an unlimited amount of data.

However, now that AT&T offers a tethering option, it is most likely illegal to use MyWi to tether, since AT&T will not make their $20/month from you.

I don't know what's missing on the iPhone 4. I'll get back to you in a year when they release the iPhone 5, then I can tell you some things that the iPhone 4 is missing.

• all of the things you have listed.
• front facing HD camera (i personally think it would be cool for facetime)
• 3G for facetime

Missing on the iPhone 4:

• Faster Processor Like the Dual-Core SnapDragon
  
• 4G (WiMax)
  
• Removable/Replacable Batteries
  
• Slot for additional memory
  
• Allow users to disable Apple KillSwitch
  
• Wirelessly Sync with iTunes
  
• Allow userss to choose from a selection of providers
  
• Allow users to get app sources besides the Apple App Store
  
• Make it more durable; not so fragile
  
• Allow users to decide for themselves what software goes on their iPhone that they paid for
  
• Let user change the default SSH root password of alpine
  
• Compensate users experiencing the reception issues until fixed
  
• It's missing a bunch of stuff more ...

I'm passing on the iPhone 4, and keeping my iPhone 3G[s] until a better offer (smartphone & plan) comes along.

First of all ? Carrier signal , that's what is missing.

CDMA compatibility. Next to the signal bars, instead of it saying "At&t" it says "VZW" or "Verizon"

• Android
• MicroSD slot for expanded storage
• Internal antenna

Antenna. Android. And it is using AT&T, so of course that makes it even more crappy.