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Thread: Question about AT&T IMEI detection

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    Question about AT&T IMEI detection

    A few years ago I was using a Nokia dumbphone (non-smartphone) with AT&T's $10 unlimited family data plan. A year later I bought an unlocked Nokia smartphone, just popped in my SIM, and even though I technically should have been on AT&T's smartphone plans, nothing has happened to me in the 3+ years I've owned the phone. I get unlimited smartphone data on the $10 plan.

    I've heard, however, that AT&T detects the IMEIs of customers and forces them to switch to the smartphone plans. Why hasn't this happened to me? Is it only for iPhone users? What is it about the iPhone that makes it any different than Nokias in terms of how AT&T detects them and switches customers to smartphone data? I've heard people who buy unlocked iPhones (even without AT&T knowing) are still automatically switched to iPhone data plans.

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    All smartphones are not immediately treated as such by AT&T Mobility. This could be due to the fact that they have chosen not to do anything about the phone or there may be so few in use that it is not worth enforcing the rules on smartphones.
    Earl F. Parrish

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    So AT&T has every iPhone in the world, locked or unlocked, in its database so that it can detect it? I guess it doesn't have that for my phone, or maybe they just don't care.

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    AT&T will detect every iPhone as they have released every model that has ever been made.

    A good way at figuring out if AT&T will detect the phone is finding out if they have ever carried it. While there are many exceptions to this rule (i.e. Nexus One, Nexus S), this is a good start. Also, it is possible that AT&T may carry a certain model of a phone but not detect the same phone if it is the international model unlocked (i.e. Canadian HTC One X).

    It is always best to do the research once you find a model you like before purchasing.
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    Quote Originally Posted by Droiiiiiiiiid View Post
    AT&T will detect every iPhone as they have released every model that has ever been made.

    A good way at figuring out if AT&T will detect the phone is finding out if they have ever carried it. While there are many exceptions to this rule (i.e. Nexus One, Nexus S), this is a good start. Also, it is possible that AT&T may carry a certain model of a phone but not detect the same phone if it is the international model unlocked (i.e. Canadian HTC One X).

    It is always best to do the research once you find a model you like before purchasing.

    So AT&T can detect a foreign, unlocked, jailbroken (etc, etc) iPhone? Seriously?

    I guess I should count myself lucky that they never detected my Nokia E71/E72. Am I under a moral obligation to call them up and tell them? (lol)

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    Unbranded Nokia phones are rarely swept by the billing system. You should not have any trouble, but never say never. You are under no obligation to advise them ahead of time.
    If I'm annoyed and you're annoyed, does that make us a paranoid ??

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    Since this is related to the topic I just thought I would ask here instead of starting a new thread. I currently have a iPhone unlimited data plan and getting a HTC ONE X today. Will the system automatically detect my phone and change my plan to unlimited data for LTE or will I have to call in to have them manually make the switch? Also should I be worried about the system maybe switching me to a tiered data plan?

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    Quote Originally Posted by iirundis05 View Post
    Since this is related to the topic I just thought I would ask here instead of starting a new thread. I currently have a iPhone unlimited data plan and getting a HTC ONE X today. Will the system automatically detect my phone and change my plan to unlimited data for LTE or will I have to call in to have them manually make the switch? Also should I be worried about the system maybe switching me to a tiered data plan?
    If you are getting the One X as a contract upgrade through an AT&T corporate store or online, they should automatically do it for you there. If not, they will detect it and ask you to call them to activate the 4G service.

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    Nokias are fine, my N8 (symbian belle) still works on the $10 plan, so does my 808. The Nokia (Symbian) user base is just too small for them to care I guess..

    Now, there seems to a problem with the latest Symbian version tho. Symbian uses WebDav to create hot-spot connections, and apparently the US doesn't allow them anymore, so Nokia have tweaked their latest firmware to somehow detect the carrier (country) and it doesn't allow web-dav connections to be established, therefore you can't tether over Wi-Fi with an 808 for example. My older N8 is running an older version of symbian, and it works fine.

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    Quote Originally Posted by igarvey View Post
    So AT&T can detect a foreign, unlocked, jailbroken (etc, etc) iPhone? Seriously?

    I guess I should count myself lucky that they never detected my Nokia E71/E72. Am I under a moral obligation to call them up and tell them? (lol)
    Depending on what plan you're on, if I remember right, the old Cingular-early-AT&T days had two data plans.

    One was for feature phone/smartphones and that included the Nokia Symbian devices. The other was the "PDA Phone" plan for Windows Mobile, Treos, etc.

    The Nokia E61, E61i, etc were "smartphones" instead of "PDA phones" so they got the cheaper data plan. Kinda like how Windows Mobile Smartphone (Like the Cingular 2125) got a different plan than Windows Mobile PDA (Treo 750).

    If you're still on such a plan, chances are you're actually right within its original terms.

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    I'm sure AT&T is working with the GSM Alliance. they hand out the IMEI's to the manufacturers so that they can control the numbers to avoid duplicates as much as possible. when your phone makes a call it transmits your phones IMSI (International Mobile Subscriber Identifier) and the IMEI of the phone to the carrier for tracking purposes, AT&T's data controls i'm sure detect that and match it up to a range of numbers from the GSMA to tell if it is a smart phone or not. From what i've heard they are pretty successful. and they aren't applying the cheap feature anymore they are applying the $30 3G plan

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    Has anyone used a non-ATT (international version) of the Lumia 900 on one of the old unlimited data plans? Will it get picked up in a system sweep?

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    I was wondering the same thing about international Nokias. Actually, I was considering the Lumia 920, but would rather not buy it from AT&T. I'm on the current unlimited non-smartphone plan for $10. I would hate to pay full price for the phone and then get forced to a different data plan.

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    Quote Originally Posted by djstone View Post
    I was wondering the same thing about international Nokias. Actually, I was considering the Lumia 920, but would rather not buy it from AT&T. I'm on the current unlimited non-smartphone plan for $10. I would hate to pay full price for the phone and then get forced to a different data plan.
    Its not "supposed" to work at all on the LTE system unless AT&T changes the plan in its system. However, I had the unlimited iPhone 3G plan $30 on my account when I switched to the Lumia 900. 4G worked, but nothing else. No LTE, no visual voice mail. If you want the full service, then expect to pay the full price.

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    iPhone 2g is ok as well. Have one that I use on standard data plan without issues. But as soon as the sim is used in a 3G or higher phone, AT&T would text me saying account will be upgraded.

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