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Old 02-23-2005, 10:05 AM   #1 (permalink)
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Default New AT&T Blackberry 7290 and My Existing Cingular SIM...

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Hi. Hoping someone can help here. I just got a new Blackberry 7290, AT&T branded, but when I put in my existing Cingular SIM card in there, I get a data connection refused error although the phone works fine. Calling Cingular/AT&T for help, they tell me that the AT&T and Cingular data networks are not compatible and that there's no way for me to use my Cingular SIM on my AT&T Blackberry. Is this true? I'm thinking there's some setup things that's required for my existing Cingular account for me to access the Blackberry network, no? Please help. Thank you.
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Old 02-23-2005, 10:36 AM   #2 (permalink)
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When they say that Cingular an AT&T's data networks are not compatible, they may be referring to AT&T using 850MHz and Cingular using 1900MHz, but the 7290 is a quad-band phone that supports all GSM/GPRS frequencies. I suspect that the problem may be that you do not have Cingular's BlackBerry data service, which is different from their "regular" data service.
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Old 02-23-2005, 11:22 AM   #3 (permalink)
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I got the same error when putting a SIM from an AT&T UMTS card into an AT&T GSM Blackberry
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Old 02-23-2005, 09:05 PM   #4 (permalink)
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Is anyone actually using a AT&T branded 7290 on the Cingular network?
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Old 02-23-2005, 10:06 PM   #5 (permalink)
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I'm using an AT&T branded BB, with an AT&T branded SIM chip. It displays Cingular on the main screen sometimes, but mainly AT&T Wireless appears in the ribbon on the main screen. Hope that helps in some way.
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Old 02-24-2005, 04:37 PM   #6 (permalink)
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Acutally was interested in whether a Cingular SIM (with Blackberry data access) works on a AT&T unit. I'm thinking it doesn't based on some other things I've read regarding different network settings between AT&T and Cingular. The AT&T unit is preconfigured with AT&T configuration so either I would have to figure out all the Cingular equivalents or try and get help from Cingular support (which I've heard is not very good).
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Old 02-25-2005, 07:01 AM   #7 (permalink)
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Quote:
Originally Posted by silky_green
Acutally was interested in whether a Cingular SIM (with Blackberry data access) works on a AT&T unit. I'm thinking it doesn't based on some other things I've read regarding different network settings between AT&T and Cingular.
Well, there's an easy way to find out. Add the service and test it. If it doesn't work, cancel the service.
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