my take on 64k sim cards and their actual use. please fill in the gaps
the 64k sim aside from a little more space to put just as little more information on the sim only uses the extra space to not confuse customers. there is an appication that is loaded onto the 64k sims. it comes with a single alpha tag. where it says "CINGULAR" on the screen, thats an alpha tag. the alpha tag lets you know what network you are currently using. this has never worked accurately.
Anyway, the application on the new 64k sim card tells your phone which network to use primarily, this means that you can have a sim card which will choose either an AT&T network or a CINGULAR network as a primary network MNC (mobile network code) this is all completely random and you will not know which card uses which network primarily.
cingular...
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Anyway, the application on the new 64k sim card tells your phone which network to use primarily, this means that you can have a sim card which will choose either an AT&T network or a CINGULAR network as a primary network MNC (mobile network code) this is all completely random and you will not know which card uses which network primarily.
cingular...
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so, since the merger, we have had customers coming in with unregistered sims, we are assuming the phone isn't swicthing from at&T to cingular towers seamlessly. turning the phone off and on fixes the problem, but the problem persists. so now we are at the point of just giving them the 64 k sim. do you think that will fix this issue??
our tech has emailed people about this issue and no one has a fix for it yet. cust care acts like here in the store we have no idea what we are talking about and the issue is the phone or poor coverage in our area.
our tech has emailed people about this issue and no one has a fix for it yet. cust care acts like here in the store we have no idea what we are talking about and the issue is the phone or poor coverage in our area.
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what you are talking about sounds like a authentication or roaming network problem... it may be because cingular network has noticed the sims and kicked them off of the network, not sure but its a possibility. powercycling the phone will fix it because it tells the phone to reauthenticate on the network, then after a while it looses that network and doesnt try and select another network. an IRDB update will be the easiest start to repairing the issue. there may be something the network ops teams are doing to the tower SIDS in that area causing the towers to temporarily kick them off of the network and it wont update until they turn the phone off and back on(power cycle).
as far as activating a 64k sim card on an AT&T account i dont bel...
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as far as activating a 64k sim card on an AT&T account i dont bel...
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sorry, i didn't say i was trying to help non migrated att cust, just our cingular customers
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😲 😕 sorry...
in that case a new SIM card may work because the sim cards (from what i understand) are randomly built to use one specific MCC/MNC on its IRDB I.e. either cingular 310410 or AT&T 310380 mcc/mnc is mobile country code and mobile network code... the first 6 digits in a GSM phones IMSI)
so theoretically switching the 64k sim can help, but you run the risk of going through a lot of sim cards before you possibly get the one that preffers a cingular mcc/mnc over an AT&T mcc/mnc... it is hit or miss and you wont know due to the single alpha tag until you try it. that can make for a lot of potential return visits from the customer and a loss of SIM cards for you. if what i stated is indeed the issue.
like i said this is ...
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in that case a new SIM card may work because the sim cards (from what i understand) are randomly built to use one specific MCC/MNC on its IRDB I.e. either cingular 310410 or AT&T 310380 mcc/mnc is mobile country code and mobile network code... the first 6 digits in a GSM phones IMSI)
so theoretically switching the 64k sim can help, but you run the risk of going through a lot of sim cards before you possibly get the one that preffers a cingular mcc/mnc over an AT&T mcc/mnc... it is hit or miss and you wont know due to the single alpha tag until you try it. that can make for a lot of potential return visits from the customer and a loss of SIM cards for you. if what i stated is indeed the issue.
like i said this is ...
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tech support said that we are the only area this is happening too, and to just power cycle the phone.
what a pain in the a$$, if i were just a customer i'd be so mad if my phone did that, came up unregistered for no reason all the time.
what a pain in the a$$, if i were just a customer i'd be so mad if my phone did that, came up unregistered for no reason all the time.
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