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Thursday, February 21, 2008 -- 10 a.m. -- out and about
Apple has a great little chart that shows what each icon on the iPhone means, and I thought today was a good day to post it.
Why? Because I got an e-mail last night from a caller who asked about that blue square without an E in the middle. She thought that meant something is wrong with EDGE.
Not quite. The blue square alone as you can see from the chart above is actually the symbol for GPRS instead of EDGE. EDGE and GPRS are related, where EDGE is a faster version of GPRS. Normally, when EDGE isn't available, a cell phone will fall back to GPRS if that's available.
Depending on where you live, you may not see the blue square alone all that often -- especially in large metro areas that are fully blanketed by EDGE. The more rural you get, the more you may see the blue square.
In layman's terms, if EDGE is a turtle, GPRS is a turtle that just ate Thanksgiving dinner. You'll have Internet access, but you won't be getting anywhere any time soon.
Here's a look at average speeds in cellular technology:
GPRS: 20 kilobits/sec. (comparable to (see turkey example above)).
EDGE: 60 kb/s (comparable to dial-up).
UMTS (3G): 384 kb/s. (comparable to slow DSL).
HSDPA (3.5G): 7.2 megabits/sec. (comparable to a fast home connection).
The rest of the chart is pretty self-explanatory, save perhaps for the TTY symbol.
But if you have questions, do ask me. And thanks for the e-mail that got me to post this.
Thanks for calling.
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