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Old 02-17-2010, 06:49 PM   #1 (permalink)
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Default Unlocked AT&T 8310 Does NOT Recognize T-Mobile SIM Card!

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Hi everyone,

Mi unlocked AT&T Blackberry Curve 8310 Was working fine with my T-Mobile SIM card until one day in November "app error 523" appeared. Now i've reset the device and it shows:
SIM: Disabled
Network: Disabled
Network Subset: Disabled
Service Provider: Disabled
Corporate:Disabled
I know this means the device is technically unlocked but it says "No Valid SIM Card" at the top with my T-Mobile SIM! I have no idea what's wrong, and I know it's not my SIM card because it works in another T-Mobile phone. All help would be very appreciated.

Thanks.
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Old 02-17-2010, 07:31 PM   #2 (permalink)
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I am not kidding - are you 100% sure you have the SIM card in the right way?
That's the only plausible explanation.

Thanks.
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Old 02-17-2010, 07:36 PM   #3 (permalink)
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Thanks for your reply. It's very appreciated. But yes, I've actually cleaned tha connectors wit a t-shirt and everything, and when I re-inserted the card I made sure it was in the right way and secured. I've done it more than once. I'm totally lost on this one and I'm sure many others are also.
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Old 02-17-2010, 07:38 PM   #4 (permalink)
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Omg what a coincidence, I just did it 2 more times and it works Thanks Blackberry Forums. Sorry if I wasted your time though.
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Old 02-17-2010, 08:05 PM   #5 (permalink)
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It was most certainly NOT a waste of anyone's time. Glad it is working!!!!

Don't remove it!
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