[geopiet]

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

[JSanders]

Yep.

[geopiet]

Originally Posted by JSanders

Yep.

Quick and to the point but I still would like to know more.....

What are these terms, and why there is a difference?

[John Clark]

I've wondered the same thing myself.

[serrano_yejo]

Originally Posted by geopiet

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

[monkeypaw]

Thanks so much for this. When my sms stopped working I googled to find out what the difference was and never found an explanation.

[John Clark]

Great explanation--makes sense. However, I've never noticed any difference after changing these settings.