I have owned each iPhone, usually within a few days of release. Yes, since the iPhone has always supported bother a cell connection and a wifi connection, the devices have both. Additionally, people have been reporting problems with both the 3G antenna issue and connecting to wifi routers. I had both. I said nothing about them both being related to the same antenna problem. I suffered from both. I exchanged my phone today at the Apple store in downtown SF and have had no problems since. Don't understand why I was downvoted SO much for that. I'm happy that you downvoters have had excellent experiences with the new device. Did you wait in line for over 5 hours for yours? If I wait that long for a product, I apologize for having the expectation THAT IT WORKS.
You do. The signal strength bars are to the left of the carrier name, while the connection type (EDGE, 3G, WiFi) icon is the right.
The WiFi icon (which acts as a signal strength indicator for WiFi connections) unfortunately does hide the cellular data indicator, which shows whether you're connected to EDGE or 3G.
What I mean is you could have full voice signal with no data signal and not know it if you are connected to wifi too. Most areas have at least GPRS, but you can still find some towers that are voice only. Because of this you really don't have an indication of your cellular data. You can assume you have it, which is true most of the time, but you can't know for sure.