AT&T unlimited plan flagged after minutes in P6800

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Got my P6800 today...

I've read here (and elsewhere online) that I could simply use my current AT&T SIM (unlimited grandfathered data plan with iPhone 3gs) and as long as I don't go crazy with BW, it should go unnoticed.

So I did (just for a couple of minutes to make sure it works), and a few hours later I got a text msg and an email from AT&T suggesting that I call them to get "an appropriate" data plan.

So it looks like they flag a tablet right away and not based on usage. When I signed up (before the age of tablets) I don't remember them specifying anything that prevents me from switching but I'm sure it's somewhere in the fine print.

I'm not a heavy data user but I don't want to give the unlimited plan unless I have to. Would be happy to hear some thoughts an recommendations on how to handle it.
Thanks
O

P.S
the 7.7 is awesome. just sux that AT&T ruined my happy day with that email :(

Have they actually throttled your speeds? I'm not your lawyer, but you could just ignore it for the time being.

Past experience

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I had the same experience last year with the Tab 7.0, with phone capabilities. I had an unlimited plan with old iPhone. I had to switch to I believe 4G per month, plus tethering cost about $10.00 more, once I did, never a concern or a problem since. It is their way to eliminate all unlimited plans.

At least that was my experience. I believe when it occurred when folks got the 7.0 w/phone (European version and custom ROM) if you don't respond, soon your data will be cutoff, so then you have to call or pull Sim card. May not be true today, but it was last year, happened to me.

What APN were you using..? Was this from an iphone 3g,3gs,4,4s..? If im correct when you get an iphone 4s the account is provisioned for hspa+. I am using a sim from an iphone 4 and have yet to receive a message. So it seems strange.. ive had my tab for a few weeks already...

Sent from another Galaxy...
Tab 7.7

Greedy bastards, thank god the merger didn't go through. I can imagine how many people will jump ship once the T-Mobile - att roaming agreement goes through and all those iphone users join T-Mobile

Sent from my SGH-T959 using XDA App

Been using ATT Prepaid for about 2 weeks and no problem with that.

mine is a 3gs iphone. Not pre paid card.
Dont think they changed anything. The email said i need to call them to get a suitable plan.
I dont stream and never passed 2g on my iphone so i should be ok with a 3-4 g plan but it still feels like a rip off.

I doubt ignoring it will make it go away. Im just wondering if there is any chance of arguing about it and win...
O

Try adding an APN named Broadband with APN Broadband (leave all other settings as default).

Broadband is the APN for the ipad.. i think if they are auditing that APN he would get flagged for sure as his device in the database should be an iphone.

Sent from another Galaxy...
Tab 7.7

So, would it be possible to add whatever APN is used for the original iPhone 3gs and (maybe) bypass their flag?