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> Displayed Carrier name - from Tower or SIM card?
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When an
phone displays the carrier name, is that name pulled from the tower in use or the SIM card?
I'm guessing the SIM card. My carrier, Cingular, is (once again) becoming AT&T. My friend with an HTC Hermes (also on Cingular) saw the displayed network name change from "Cingular" to "AT&T" a few weeks back, even though he has a Cingular SIM card. OTOH, my W810 and my wife's K551 (each with a Cingular SIM card) both still show "Cingular." This is the case throughout our area.
Is there a setting to change this? (On Motorola's, there's a SEEM edit that can do this.)
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Posted: 2007-05-03 16:05:21
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I'd say its the tower because no matter where I roam in the world I always see the carrier name that I am connected to
sometimes I have seen two carriers, the local roaming one and my home one on a second line
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Posted: 2007-05-03 16:13:34
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Same as Masseur.
I guess it is from the carrier, not the sim card.
I have a belgian sim, bought from a belgian carrier. However, when visiting the US, the phone shows the name of the US carrier.
Same when I go to another country (France, Germany, Canada, UK, ...): the name is from the local carrier I am connected to.
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Posted: 2007-05-03 16:16:43
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It's definitely from the network. It's just that it takes longer for SE phones. My carrier changed its name from OLA to Tigo and friends using Nokias saw the change immediately, but it took almost a month for my W800 to change.
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Posted: 2007-05-03 16:32:30
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definitely tower NOT sim! Voda-ireland recently performed a little "live" test,
so for 4 or 5 days their prepay customers showed a "@" on the screen where there's usually "vodafone.ie"... unfortunately they went back to "vodafone.ie" - but yeah, I checked: they can remotely chanage it, and it's nothing to do with the sim!!!
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Posted: 2007-05-03 16:33:36
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It gets it from the tower. As far as I am aware the tower only sends a unique network id code which then phone compares against its database as older phones still say bt cellnet instead of O2 and one 2 one instead of t-mobile
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Posted: 2007-05-03 16:35:38
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Then I guess if the phone does not find it in it's database, it asks the network for the name. Because when travelling I can see the name changing according to the signal strength of the various networks at the location. Funniest was when visiting the Niagara: moving by some meters the name would change from US networks to canadian ones and back. None of which my belgian phone knew about as they were very local networks.
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Posted: 2007-05-03 16:49:08
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Hmmm... I'll have to wait and see, then, if/when the name changes.
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Posted: 2007-05-03 16:57:47
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On 2007-05-03 16:49:08, michka wrote:
Then I guess if the phone does not find it in it's database, it asks the network for the name. Because when travelling I can see the name changing according to the signal strength of the various networks at the location. Funniest was when visiting the Niagara: moving by some meters the name would change from US networks to canadian ones and back. None of which my belgian phone knew about as they were very local networks.
IS THAT LIKE HERE IN iRELAND WHERE THEY ARE ALL CROSS-FEEDING ("FEEDING"!? TSSK)... WHERE NETWORKS IN "IMPOVERISHED", rural AREAS SHARE MASTS/INFRASTRUCTURE, SO MY wife's phone's on meteor but 50 metres from our house it switches to o2 and so on...????
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Posted: 2007-05-03 16:58:55
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it's a bit of both to be fair boys and girls...
mainly the network but without the subscriber identity module (SIM) you ain't getting anywhere.
your sim card is a very very clever bit of kit, currently either 64 or 128k cards, they do a lot more than hold 100 phone numbers, 15 sms and your number.
SIM cards store network specific information used to authenticate and identify subscribers on the Network, the most important of these are the ICCID, IMSI, Authentication Key (Ki), Local Area Identity (LAI). The SIM also stores other carrier specific data such as the SMSC (Short Message Service Centre) number, Service Provider Name (SPN), Service Dialing Numbers (SDN), and Value Added Service (VAS) applications.
see SPN.... and yes the network can remotely change it, but do you not remember the days on a nokia where you could have your own operator logo? your network did not change that for you...
they are kind of antagonistic, without the SIM the tower won't know what's happening and without the base station the SIM won't know what's happening!
it is most definitely not 100% the tower...
a wee lesson in SIM cards for you
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Posted: 2007-05-03 19:54:02
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