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Want your Unlimited Data Back? Here's How

Hello Everyone,
If you were like me when getting your new phone, the sales rep had a new sim card processed and in your phone before you could kiss your old one good bye.
In the garbage can went your old sim card and your unlimited data plan in the process.
Many of the sales reps will not set up the unlimited automatically for you.
Note: You need to be grandfathered in.
If you had unlimited, you can simply walk back into the store and have it reactivated.
Don't know if you lost your unlimited?... Dial *3282# on your phone and it text you with data usage as well as any changes to the plan. Looks like this...
Next Bill Cycle: 03/09/2011
Data (MB): 557.4 of Unlimited (Deactivated)
Data (MB): 1941.7 of 2048 (Deactivated)
Data (MB): 1030.3 of Unlimited
Messaging: 696 of Unlimited
Messaging: 660 of Unlimited (Deactivated)
Now that mine is reactivated. I'm good to go. You only have 30 days to get it switched back, so act fast.

Are you trying to say that you don't have the 5gb cap on your data plan?
Sent from my HTC Glacier using XDA App

JWGWulff said:
Hello Everyone,
If you were like me when getting your new phone, the sales rep had a new sim card processed and in your phone before you could kiss your old one good bye.
In the garbage can went your old sim card and your unlimited data plan in the process.
Many of the sales reps will not set up the unlimited automatically for you.
Note: You need to be grandfathered in.
If you had unlimited, you can simply walk back into the store and have it reactivated.
Don't know if you lost your unlimited?... Dial *3282# on your phone and it text you with data usage as well as any changes to the plan. Looks like this...
Next Bill Cycle: 03/09/2011
Data (MB): 557.4 of Unlimited (Deactivated)
Data (MB): 1941.7 of 2048 (Deactivated)
Data (MB): 1030.3 of Unlimited
Messaging: 696 of Unlimited
Messaging: 660 of Unlimited (Deactivated)
Now that mine is reactivated. I'm good to go. You only have 30 days to get it switched back, so act fast.
Click to expand...
Click to collapse
I got mine switched back after 7 months on the 2gb...
Sent from my Desire HD using XDA Premium App

otto2009 said:
Are you trying to say that you don't have the 5gb cap on your data plan?
Sent from my HTC Glacier using XDA App
Click to expand...
Click to collapse
No ATT only has a 2Gig plan.

Yeah I ordered mine over the web and by by went my unlimited data plan. Until I called and asked for RMA instructions as I was going to return the phone if they didn't reinstate my plan.

thank you for this information. My unlimited plan "accidentally" got changed to the 2GB plan yesterday when I got my inspire. A call to ATT seems to have the "accident" corrected.

Don't know if you have tried it yet, but your tethering will also be gone now. Now the phone has to be rooted in order to be able to use the HTC Hotspot for free.

I called customer support today and complained about losing my data plan. They submitted a case and a few hours later voila! Unlimited data returns. Very simple
Sent from my Desire HD/Inspire 4G using XDA Premium App

at&t customer service sucks dead donkey parts no matter which way you cut it lol. when I exchanged my atrix for the inspire yesterday at the local at&t corporate store, the salesman try to convince me that I had to downgrade my 30 dollar unlimited data plan with 4 g service activated on it to a data pro plan. and then he want to charge me to copy my contacts from the atrix to the inspire on top of it lol. I simply said really? It's not an iphone I think I can manage to copy my phone contacts.
Sent from my Desire HD using XDA App

JWGWulff said:
Don't know if you have tried it yet, but your tethering will also be gone now. Now the phone has to be rooted in order to be able to use the HTC Hotspot for free.
Click to expand...
Click to collapse
Have you seen this thread? http://forum.xda-developers.com/showthread.php?t=960058
Root is not necessary to enable wifi hotspot

or u can find a buddy with a 2g iphone and activate it under your account. pick one of the 3 unlimited data plans. once you insert your sim into the inspire at&t will prompt you in a text message that the 3g unlimited data plan was added...

Thanks for the info. Can anyone confirm that I am still on the unlimited plan, the text I got was a little confusing....
Data (MB) 169.1 of unlimited
Date (MB) 4755 of Unlimited (Deactivated)
Messaging: 906 of unlimited
Can anyone decode this for me?

Att data plans

Hey guys, i have an inspire, i was wondering if i activitated an old att basic messaging phone unlimited data plan, would it work with my inspire? And would it provide mr with the same speeds?
Thanks!
Sent from my Desire HD using XDA App

Are you a new customer? Or are you conming from a previous smartphone like an iPhone?
Sent from my HTC Vision using XDA App

I have the same question.
I just bought an Inspire for a dumphone line that didn't have the $10 unltd data. So I guess there's no way around this line since I already bought it? I bought it at full retail no commitment. We still have the original device.
But we also have 2 other dumbphone's in the family plan that are ready for smartphones. They don't have $10 unltd data. If I got the $10 unltd on each now and in about a month(when we are ready to buy smartphones) can we get untld data on the 2 new smartphones?

you can try, but it wont work because as soon as the IMEI of the inspire registers with the network, the auto sweep tool bumps your line to the proper smartphone data plan.
but i would definitely give it a shot. however note that you dont want to lsoe your grandfathered unlimited data plan if that is what you have, and once you get bumped it might be impossible to get it back.
the best choice, which is how people avoid this, is to only use non-ATT phones that they dont know or consider smartphones. but the inspire will get detected guaranteed immediately.

RogerPodacter said:
you can try, but it wont work because as soon as the IMEI of the inspire registers with the network, the auto sweep tool bumps your line to the proper smartphone data plan.
but i would definitely give it a shot. however note that you dont want to lsoe your grandfathered unlimited data plan if that is what you have, and once you get bumped it might be impossible to get it back.
the best choice, which is how people avoid this, is to only use non-ATT phones that they dont know or consider smartphones. but the inspire will get detected guaranteed immediately.
Click to expand...
Click to collapse
This is my situation;
1 iPhone unltd data(grandfathered)
2 dumbphones with no data(messaging phones)
1 recently bought Inspire with 2gb data plan
My question is about the 2 messaging dumbphones. They currently have no data. The 2 want smartphones in about a month. If I get the $10 unltd data now on the 2 messaging dumbphones can I buy 2 unbranded smartphones and be able to get unltd 3G data? Do I need to get a $10 plan for each messaging phone prior to buying an unbranded phone?
I'm not going to mess with the iPhone 4 with grandfathered unltd data.

I have a Captivate with IP3G unltd. data and 2 regular lines on a family plan. I can't upgrade Captivate but use upgrade on 2 other lines. Can I order Inspire as an upgrade for a regular line and use it with my IP3G SIM from Captivate?

My experience with this:
I had a theory about iPhone 2G data plan trick and did my own spin on it. With my Inspire 4G activated and powered on, I put an old SIM card into an iPhone 2G and activated the iphone through iTunes. It let me switch to the iPhone 2G unlimited plan + 200 txt for $20, but the actual voice/data did not switch over to the iPhone because the SIM card is old/unprovisioned.
I don't know exactly why, but I've been on the unlimited 2g + 200 txt (no MMS of course) plan for three weeks now with no data plan bump. The AT&T account website recognizes the Inspire IMEI (displays the Inspire on my account). However, it will not let me remove the 2G plan and upgrade to the smartphone personal unlimited.

ATT has been really sketchy about this... all you have to do is call customer support or go into the store and say that your unlimited was removed without authorization.
I got mine back on. You will need it.
Sent from my Desire HD using XDA App

JWGWulff said:
ATT has been really sketchy about this... all you have to do is call customer support or go into the store and say that your unlimited was removed without authorization.
I got mine back on. You will need it.
Sent from my Desire HD using XDA App
Click to expand...
Click to collapse
I never had unltd data on the messaging phones. I know which unbranded phones I'm going to purchase in about a month.
What should I do to take adsvsndage of unltd data on the new unbranded smart phones I'm asking. Get the messaging phones on unltd data now or it doesn't matter?

Unlimited Plan not HSPA+ compatible?

I received an email saying that i need to get a 4g/hspa+ plan and looked online at my account, which shows the limited data plans as the 4g/hspa+ and unlimited isn't compatible. It also said i need to upgrade to a 4g/hspa+ sim card, but i am using a iphone 4 micro sim with the adapter to regular sim. My question is, has anyone else got this email and are people getting the 4g/hspa+ speeds without the limited plans? I hope this is just a gimmick to get people to jump plans but i am not going to be a happy camper if this is true, which this so called 4g/hspa+ is only 3g at the end of the day.

Call a rep I had to change from blackberry to 4G and still have unlimited data just call into customer service, they will have to get a manager to verify, and the new sim should come with the phone .

I'm currently on the smartphone unlimited data plan and came from the iphone 4 unlimited plan. The problem is if you look at your account there saying that unlimited plans aren't hspa+ compatible. I did use the sim card the came with my phone, which was just a 3g sim card and then i went back to my micro sim because i like being able to switch phones when i want too. I also went up to the store and the rep told me i need a 4g sim card then went to another store and they told me there is no difference in the sim card. This hole 4g/hspa+ crap is so confusing and miss leading. I love my inspire 4g but att is making my experience and living hell.

onthezone said:
I'm currently on the smartphone unlimited data plan and came from the iphone 4 unlimited plan. The problem is if you look at your account there saying that unlimited plans aren't hspa+ compatible. I did use the sim card the came with my phone, which was just a 3g sim card and then i went back to my micro sim because i like being able to switch phones when i want too. I also went up to the store and the rep told me i need a 4g sim card then went to another store and they told me there is no difference in the sim card. This hole 4g/hspa+ crap is so confusing and miss leading. I love my inspire 4g but att is making my experience and living hell.
Click to expand...
Click to collapse
The 4G sim card is for lte they are just trying to make a buck. The hspa+ is 3G+ essentially. If you have unlimited data then your fine. As far as I am aware there is no unlimited 4G data plan because its still running off 3G, the only difference in data plans right now besides the tiered options is blackberry data, pda data, and smartphone data.
If you are worried about it, call customer service and have them switch your plan and make sure you keep unlimited. If they say you can't, hang up and call back until you get some one who will.

Thats what i thought about the sim card but i guess i have to wait to see if i get hspa+ with my phone with the unlimited smartphone plan, as there is no 4g/hspa+ unlimited plan only 2gb and 200mb plans. Not going to downgrade for just faster speeds.

Take mudknot's advice and call AT&T customer care. Tell them you are grandfathered into unlimited data and you want to migrate that feature over to the 4G data plan. You won't see an option for unlimited 4G data on the website because AT&T wants as many users as possible on the new tiered data plans.
Sent from my TPC Rom/Buzz Kernel-powered Inspire 4G using the XDA Premium App.

dyne2199 said:
Take mudknot's advice and call AT&T customer care. Tell them you are grandfathered into unlimited data and you want to migrate that feature over to the 4G data plan. You won't see an option for unlimited 4G data on the website because AT&T wants as many users as possible on the new tiered data plans.
Sent from my TPC Rom/Buzz Kernel-powered Inspire 4G using the XDA Premium App.
Click to expand...
Click to collapse
So there is a 4g unlimited? been a long day for me sorry. If so I'll call tomorrow.
Sent from my Inspire 4G using XDA Premium App

Yes there is a 4g unlimited plan, only for existing unlimited customers. It only will show up online as unlimited smartphone data. The sim card only is for lte which in not the inspire.
Sent from my HTC Inspire w/XDA app

I think the problem is the difference between the iPhone data plan (which utilises visual voicemail) and the android one. Just do what these guys say and call customer assistance and ask them to migrate your unlimited data into an android-capable plan, and they should do so without a hitch.

cookw24 said:
I think the problem is the difference between the iPhone data plan (which utilises visual voicemail) and the android one. Just do what these guys say and call customer assistance and ask them to migrate your unlimited data into an android-capable plan, and they should do so without a hitch.
Click to expand...
Click to collapse
I do have the smartphone unlimited plan but was making sure there wasn't if there was a 4g unlimited plan now.
Sent from my Inspire 4G using XDA Premium App

So are we ok on the "smartphone personal" unlimited plan then? They tried to get me to switch too. I was like Hell no lol.
Sent from my Desire HD using XDA App

when i ordered my phone online I had to sign up for the new 2gb data plan.. I used to have the 5gb unlimited plan.. but he computer wouldnt let me leave things be. I know if i wouldve went to best buy i wouldve been able to keep the old plan.. I may call customer support. to see if they can fix it back

they took off my unlimited plan when i switched from my 3gs. but i really dont care, since wifi is where its at. its the only true 4g. (joking btw)

mudknot2005 said:
The 4G sim card is for lte they are just trying to make a buck. The hspa+ is 3G+ essentially. If you have unlimited data then your fine. As far as I am aware there is no unlimited 4G data plan because its still running off 3G, the only difference in data plans right now besides the tiered options is blackberry data, pda data, and smartphone data.
If you are worried about it, call customer service and have them switch your plan and make sure you keep unlimited. If they say you can't, hang up and call back until you get some one who will.
Click to expand...
Click to collapse
Yup, Correct and I agree...
I have 5 line family plan ALL with the unlimited data grandfathered plan.
I have an Inspire 4G with the unlimited data +4G. Even if you have it added to your account, your account will still say the same thing (unlimited), but you will get 4G unlimited as well.

Anyone w/ an Infuse + grandfather data?

My mother got and Infuse yesterday and i was over at her house playing with it with my sim in. after i was done i took my sim out and put it back in my fuze (shudder). this morning just as i was leaving the house for the day i got a text message from AT&T telling me that "An eligible data plan is required for your 4g Smartphone. We have added an appropriate data plan. Learn more at att.com/smartphoneplans."
so i disabled data and when i went into my acct on the web when i got home, sure enough the only data feature options i could choose were the new tiered data plans. i had to put my sim in my old ooooooold tmobile MDA for an hour or so until it updated the imei and then i could go back and choose the unlimited data option.
is this normal? if i upgrade to an infuse will that cancel my grandfather'd status? has anyone else grandfather'd updated and kept their data plan? if so how? and if i upgrade through best buy or amazon at the discounted price will i be allowed to keep it or do i have to go to an att store and pay the full upgrade price?

This has happened to a few people on the forums (lost the unlimited when it switched them to 4g) but it shouldn't. Call 611 or go into a store and they can fix it for you. You can have unlimited 4g with you grandfathered plan its just apparently sometimes putting people back to the 2gb.

I was able to keep my unlimited..
sent from Infuse but miss my captivate on cont. 5.5.... One day this can be as good...

They make it a hassle, but you can keep your unlimited data.
Sent from my SAMSUNG-SGH-I997 using XDA Premium App

I got the Inuse at Best Buy and they let me keep my unlimited data without any issues. Before that I had bought the Atrix at Best Buy and had no problems either. The rep just said he was going to switch me to unlimited 4G cause the 4G plan is a bit different.

thanks all of you

the issue that occured is that our at&t systems have different classification data plans.
ie: one for blackberries, one for general smartphones (android/palm/symbian/winmo ect), iphone, and hspa+ devices. the fuse is a general classification smartphone so the message was saying that when you put your sim card in the infuse as it is a hspa+ phone, your data might not work correctly, hence the text message to change your data plan. if you go into a cor store, any rep should be able to continue your grandfathered unlimited status.

No issues here, I still have my unlimited plan...
Sent from my SAMSUNG-SGH-I997 using XDA Premium App

If they try to do that, call customer care, let them know you have grandfathered unlimited data, they will file a case to change it back. They "accidentally" did that when they provisioned our sim cards for 4g when my wife and I got our Inspire's...

Hell yeah if they remove it I woukd transfer my four family plan to Sprint, now sprint has the same customer service as verizon up date according to recent survey.
Sent from my SAMSUNG Infuse

When you call ATT tell them it's called SmartPhone Personal.

Tell them you want to keep the unlimoted plan. Some reps may say you can't but you Can. Dont ttake no for an answer.
Sent from my SAMSUNG-SGH-I997 using XDA Premium App

I'm a Rep with att. Just shoot to a store and do it. We are MORE than happy to switch you to the unlimited HSPA+ PLAN because its more commission for us. I switch it all the time!
Sent from my SAMSUNG-SGH-I997 using XDA Premium App

Ok so i duno if im getting the rite plan now. Looked online and im getting Smart unlimited..$30 .. But under that u can choose something with 4g.. Also when i click on smart unlimited this windows pops up. Whats "gold list"

It was no hassle keeping my unlimited plan. She asked and I said I wanted to keep it. Done deal.
Sent from my SAMSUNG-SGH-I997 using XDA App

bullet358 said:
I'm a Rep with att. Just shoot to a store and do it. We are MORE than happy to switch you to the unlimited HSPA+ PLAN because its more commission for us. I switch it all the time!
Sent from my SAMSUNG-SGH-I997 using XDA Premium App
Click to expand...
Click to collapse
It still possible to get an unlimited plan even if you weren't grandfather by iphone or something? I only had the option for 200mb for $15 or the 2gb for $25 and no option for unlimited.

bullet358 said:
I'm a Rep with att. Just shoot to a store and do it. We are MORE than happy to switch you to the unlimited HSPA+ PLAN because its more commission for us. I switch it all the time!
Sent from my SAMSUNG-SGH-I997 using XDA Premium App
Click to expand...
Click to collapse
ok, i have a question for you, i'm planing on getting an infuse on upgrade, selling that and getting a gs2. if i go back to the $30 unlimited plan when i upgrade after getting the gs2 would i be able to switch back to the cheaper unrecognized imei data plan that i'm on now?

if YOU don't choose to change to another plan, you stay grandfathered. I am still unlimited. If you choose to go to another plan because its cheaper and later decide to use tons of data, you cant go back. If your plan was automatically changed, let CS know. they have the ability to override and re-authorize unlimited.

If they switch me to the H+ unlimited from regular old unlimited will I be able to still use my sim in my HD2? Thanks!
Also has anyone bought from Amazon. How did you go about keeping your unlimited? Just sign up for one of the available plans and then call and have it switched back?

Grandafthered plan
I have grandfathered $30 real unlimited on infuse - only thing changed is 4G addition to it. I understand that they need to classify plans somehow but i do not believe that 4G changes anything related to connection speed. I live in Portland,OR area and eventhough ATT coverage is good localy there are still no real 4G speeds. I tried Inspire, Atrix and now Infuse and none of them went over 2.5Mbps download and 0.5Mbps upload -EVER.
All their bogus stories about 4G cards and 4G dataplans are fairytales --- GSM phone needs provisioned (active) SIM Card of any type, proper APN setup, and reciever able to decode given 3G /4G frequency bands. With such combination you can connect to any GSM network (provided roaming is enabled too). So you can switch SIM cards from phone to phone regardless of data plan in their system.
I was landing on PDX airport in 2009 from Frankfurt, had my N95 with Vodafone prepaid SIM in it and as soon as I turned it on, it autoconfigured and locked to Tmobile 3G network as I still had some money on it to use data and calls. I was also using one ATT SIM card with same data plan (switching to and from ) Iphone3Gs, HTC Touch Pro2, Nokia N97 and unlocked Motorola Defy. Never had single issue...
On the other hand, after being AT&T, Cingular, at&t customer for 10+ years, I am starting to wonder is their service generally worth the money I pay every month.
My bill is for 4 phones;
unlimited family text,
1400min,
real unlimited data plan for Infuse,
real unlimited data plan for Iphone,
2 unlimited data for non smartphones for kids ($10 each)
Total: ~$220 every month....
I was recently looking into Virgin Mobile plans and they give $40 unlimited calls, messages and data. For $25 you get unlimited calls, messages and 20 megs of data (for kids...and my kids use barely any data)
Now that would cut my phone bill about ~$100/month ($1200/year)
Problem is that my dear wife would let go of the Iphone only from her dead cold hands...and she is using it like it is Apache server ~ 10Gig/month
I know I am going off topic but regardless grandfathered or not, my data plan on ATT costs only $10 less then all unlimited package on Virgin mobile.
I am aware that they do not have fancy phones as ATT but honestly ATT does not have a near selection of good phones as Verizon or T-mobile...and lesser data speeds too.
Now I wanted some opinions on my thoughts to switch carriers (and just to let you know I never used anything but GSM since i got my first cell phone in 1993 in Hamburg Germany where I am originally from)

Over data limit every month

I have an HTC Inspire and I have the 2gb plan from AT&T. It seems like every month I go over my data limit when most of the time I either don't have signal or I run my task killer to shut down background data. I live in the country so there's no WiFi that I could ease my usage. I've gotta do something to get unlimited data. I have 2 questions:
1. Will AT&T ever come out with a 4G unlimited data plan? (like maybe after the T-mobile merge)
And 2. Is there any way I can use a loophole to get unlimited data?

2...
Why yes, yes there is.
http://forum.xda-developers.com/showthread.php?t=1036871
Come join the club of those who got the unlimited data plan that ATT "no longer sells."

They can have my unlimited data when they pry it fromy cold, dead hands.
Sent from my Inspire 4G using the power of the dark side.

The goofy thing is that my mother and brother have unlimited on their iPhones and barely use it :/

biglittlegato said:
They can have my unlimited data when they pry it fromy cold, dead hands.
Sent from my Inspire 4G using the power of the dark side.
Click to expand...
Click to collapse
1. I doubt they will ever create an brand new official marketed truly unlimited data plan for new or existing customers.
2. I actually bought the truly unlimited data plan back when it existed like 5 years ago, and have never let go of it since, so I'm happily grandfathered in. When I changed from my last 3G phone and switched to the Inspire 4G, they "upgraded" my unlimited 3G data plan to 4G unlimited data plan, same price. So for $40 I get truly unlimited no data cap 4G data and unlimited texts. Oh except it's more like $35 a month for that after my Premier discount. I'm never changing my plan again. I'm keeping my unlimited data. Unless of course they offer to upgrade my 4G unlimited to 5G unlimited in a few years time
EDIT: Oh and I never have an Iphone at any point, ever, nor claimed/told ATT that I had one. All WinMo all the time until this Inspire, with hassle free unlimited the entire time.

Didn't the loophole close at the end of April? I was gonna try it with an iPhone 2g but they said something about iTunes agreement changing to close it up or something like that

Can anybody confirm that trick still working?
Sent from HTC Aria - GB Salsa Sense 2.1 + Drowning Kernel

dnaramore40 said:
I have an HTC Inspire and I have the 2gb plan from AT&T. It seems like every month I go over my data limit when most of the time I either don't have signal or I run my task killer to shut down background data. I live in the country so there's no WiFi that I could ease my usage. I've gotta do something to get unlimited data. I have 2 questions:
1. Will AT&T ever come out with a 4G unlimited data plan? (like maybe after the T-mobile merge)
And 2. Is there any way I can use a loophole to get unlimited data?
Click to expand...
Click to collapse
1. There is/was... you had to be grandfathered in on an unlimited 3G plan to get unlimited 4G data which basically is nothing special. just uses the same "phone" apn that the iphone data plan uses instead of wap.cingular. The 4G unlimited data plan code is: HSDPPB but good luck getting it added if you don't have unlimited data already.
2. there is the itunes/iphone 2g trick which does work for some people if you start with a new fresh itunes account. i hear if the phone isnt kept active for a month or two they can go and change it manually to a 2gb plan if you switch to a different phone immediately... could be wrong but this is what i have heard.

Can you not set up a wifi router in your home to ease your usage load some?
Sent @ 04:20

AEDan1977 said:
1. There is/was... you had to be grandfathered in on an unlimited 3G plan to get unlimited 4G data which basically is nothing special. just uses the same "phone" apn that the iphone data plan uses instead of wap.cingular. The 4G unlimited data plan code is: HSDPPB but good luck getting it added if you don't have unlimited data already.
2. there is the itunes/iphone 2g trick which does work for some people if you start with a new fresh itunes account. i hear if the phone isnt kept active for a month or two they can go and change it manually to a 2gb plan if you switch to a different phone immediately... could be wrong but this is what i have heard.
Click to expand...
Click to collapse
If you had an Unlimited 2g plan, then you can go to a 3 or 4g smartphone and keep your unlimited data plan with no drama at all....well until August 31st when 2g customers get cancelled.
If you didnt have a 2G unlimited smartphone plan, youre screwed. Buy a router.

somewhastock said:
If you had an Unlimited 2g plan, then you can go to a 3 or 4g smartphone and keep your unlimited data plan with no drama at all....well until August 31st when 2g customers get cancelled.
Click to expand...
Click to collapse
Could you provide some more information on this? I searched for cancelled AT&T 2g with no luck

audiophan said:
Could you provide some more information on this? I searched for cancelled AT&T 2g with no luck
Click to expand...
Click to collapse
I dont know if any info is available on the net.
It may only apply to people who were signed up before the Cingular buyout.

[/QUOTE] If you didnt have a 2G unlimited smartphone plan, youre screwed. Buy a router.[/QUOTE]
That's another problem, I have dial up at the house so I can't use a wireless router to ease the usage. I'm pretty well s.o.l. on that part

Get your hands on a 1st gen iPhail, hard reset it, put your sim in, sync to iTunes, purchase $20 unlimited data package, wait till your acct show that as your device and plan, go to att store and tell them you'd like to have your unlimited data grandfathered to your Inspire, they'll change it while you wait(about a 5minute process), leave store smiling.
Enjoy unlimited data.
This is what I did and now no more worries of going over. In fact, I was consuming 4-5 gigs a month prior but most was on wifi wherever it was available.

I have unlimited data right now.