Screen Icons
Here's a roundup of the icons that you may see in the status bar at the top of the iPhone screen, from left to right:
Cell Signal. As on any cellphone, the number of bars indicates the strength of your cell signal, and thus the quality of your call audio and likelihood of losing the connection. If there are zero bars, the dreaded words "No service" appear here.
or
Network Type. The
means that your iPhone is connected to the Internet via AT&T's very slow EDGE cellular network (A Tale of Three Networks). In general, if you have a cell signal, you also have an EDGE signal. If you see the
logo instead, get psyched; not only are you using an iPhone 3G, but you're in one of the cities where AT&T has installed a 3G network (much, much faster Internet).
Airplane Mode. If you see the airplane ...
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