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Old 08-15-2008, 06:41 AM   #1 (permalink)
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Default SMS settings different under new OS 4.5

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I recently upgraded to 4.5. and noticed that SMS setings has different options than under system 4.2

New 4.5 options:
"Network to send over" CS, CS Preferred, PS Preferred, PS.


4.2 options:
"Network to send over" GSM, GPRS or GPRS

Last edited by geopiet : 08-15-2008 at 06:41 AM. Reason: typo
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Old 08-15-2008, 07:33 AM   #2 (permalink)
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Yep.
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Old 08-15-2008, 07:22 PM   #3 (permalink)
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Quote:
Originally Posted by JSanders View Post
Yep.
Quick and to the point but I still would like to know more.....

What are these terms, and why there is a difference?
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Old 08-15-2008, 07:29 PM   #4 (permalink)
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I've wondered the same thing myself.
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Old 08-15-2008, 08:45 PM   #5 (permalink)
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Default Wonder No More!!!

Quote:
Originally Posted by geopiet View Post
I recently upgraded to 4.5. and noticed that SMS setings has different options than under system 4.2

New 4.5 options:
"Network to send over" CS, CS Preferred, PS Preferred, PS.


4.2 options:
"Network to send over" GSM, GPRS or GPRS
PS and CS = Gprs and GSM
CS Only = GSM Only

PS stands for Packet Switch data (GPRS), and CS stands for Circuit Switch data (dial up).


put simply...

cs: is circuit switched. this is equivalent to dialup data (i.e. when you dial a telephone number) and the data is conveyed in a similar manner to a voice call

cs and ps/gprs is gsm
If you select 'CS only' then you can only make a CS type connection as described above. You will not be able to make a GPRS / 3G connection, indeed I think you will find that the phone won't even connect to GPRS / 3G, it'll say 'gprs detached'.


ps: is packet switched. this is where packets of data are transmitted either by gprs or by 3g

ps/3g is umts

If you set the phone to 'PS only', then you can make a GPRS / 3G connection, but not a CS connection at the same time as the GPRS / 3G connection is active. The implication of this is that you can't receive a call (which is CS) while your GPRS / 3G connection is active.

The "CS" setting improves battery

Last edited by serrano_yejo : 08-15-2008 at 08:58 PM.
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Old 08-15-2008, 09:12 PM   #6 (permalink)
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Thanks so much for this. When my sms stopped working I googled to find out what the difference was and never found an explanation.
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Old 08-15-2008, 09:23 PM   #7 (permalink)
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Great explanation--makes sense. However, I've never noticed any difference after changing these settings.
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