Here in the USA we have two main types of cell networks.
*) GSM = Global Systems for Mobile communications (an international std)
*) CDMA = Code Division Multiple Access (a lesser deployed std)
GSM in the USA is offered by just two carriers. AT&T & T-Mobile.
GSM phones use SIM chips that one can move from phone to phone when upgrading or replacing a damaged phone.
SIM = Single Inline Memory module.
Its a tiny memory chip on a small plastic card that inserts into the phone. The SIM memory contains your cell account info, phone number, unique identification.
The network speed your phone operates on depends on several factors. Briefly:
GSM phones (most popular world wide) have two basic speeds in the US (not counting 3G)
GPRS - basic speed
EDGE - faster speed
All start on GPRS when powered up & searching for the network. If the phone finds EDGE available, that is what it uses, if not it drops back to GPRS. Voice communications (phone calls) work fine on the slowest speed. It's data that benefits from faster network speeds.
Now with 3G becoming available (for GSM phones only) it represents the next step up in speed. Thus we have:
GPRS
EDGE
3G
All of which only apply to GSM phones, again from AT&T or T-Mobile
To use 3G it requires a hardware chip be built into the phone. Thus without this chip 3G cannot be used.
Currently AT&T offer 3G phones (no BlackBerrys yet) and have had 3G phones dor over a year. I know because I have a few on AT&T.
Another "benefit" of R
3G is that voice & data can travel over the same line at the same time to your 3G phone. This is a huge advantage. Also due to the improved quality of the 3G connection, voice calls are clearer.
Battery Drain:
Yes it requires more power to the 3G chip, but not as massive as some say it does. It depends on how the phone is engineered. Just like some cars use lots of gas & others do not. A "regular" phone like a 3G RAZR only uses a bit more than a non-3G RAZR (I have both & compared them).
A Smart Phone like the BlackBerry or iPhone or Blackjack, use more battery power on 3G due to more internet usage, larger displays, heavy email use etc. Thus to bash a 3G phone for less battery life is unfair since the phone does so much more. I would rather have all the functions of 3G & less battery life, than no 3G.
3G vs CDMA:
Speeds are affected by many factors such as line quality, network traffic, tower location, weather, etc. So, generally both are fast with 3G being consistently faster in most cases. That said, the only 3G network up, running & in most large cities is AT&T. I live in a 3G area, so it's the fastest for me. T-Mobile is rushing to catch up & will have their system in place sometime in the near future.
What to buy?
If I were advising you, I would do business with either of these two GSM carriers, AT&T or T-Mobile as they are the future. Choosing one is about finding who has the best coverage where you live & will be using your phone.
BlackBerry
The Bold is the first BlackBerry running on 3G. That's why you are seeing world wide releases of it. AT&T is working very closely with RIM (the makers of BlackBerry) to insure maximum performance of the Bold on the AT&T network. Thus the delays that we are experiencing.
Me?
Yes I want it now, but I'm OK waiting as I know it will be worth it to have the fastest & best experience with the Bold.
Hopefully I have answered the questions & clarified the differences in speeds, networks & such.
Cheers!
sent via BlackBerry
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