Cingular 8525 3G service with a ATT sim card

[Maddog468]

I’m thinking about buying a cingular 8525 phone, but I am currently under the old ATT network and have the a ATT sim card. I have not switched my service to cingular. If the phone is unlocked will the 3G service work with the old ATT sim card? I spoke with a cingular/ATT customer service agent today and they said I need to have the new upgrade cingular 3G sim card for this service. Does anyone have an old ATT sim that works with the 3G service? Thanks

[insanenyc]

YOU NEED to migrate over to cingular at&t doesen't work on 3g it works on 1900 mhz thats why your service sucks in doors . cingular will make you sign on a 2 year contract and you WILL NOT be able to keep your same plan, but the service is so much better on Cingular

[losborn]

YOU NEED to migrate over to cingular at&t doesen't work on 3g it works on 1900 mhz thats why your service sucks in doors . cingular will make you sign on a 2 year contract and you WILL NOT be able to keep your same plan, but the service is so much better on Cingular
I can't address whether or not a blue sim will work on 3G, but it stands to reason that it won't. However, if you're saying that AWS only works on 1900 MHz, I have to disagree. I have used blue sims in several phones, including an 8125 that was unlocked, and know by the buzzing interference they cause, confirmed by the test mode on a couple of Nokias and the 8125, that they worked on 850 MHz when it was available.

Be that as it may, I just got an orange-sim'ed 8525 a few days ago and am very impressed with the increased receive sensitivity and audio quality. I'm looking forward to trying it in a 2G area, but I'll have to travel a bit to do that - I live in a GSM-only service area.

(What color are the NEW sims going to be? Light blue? :) )

[gmkelly001]

I’m thinking about buying a cingular 8525 phone, but I am currently under the old ATT network and have the a ATT sim card. I have not switched my service to cingular. If the phone is unlocked will the 3G service work with the old ATT sim card? I spoke with a cingular/ATT customer service agent today and they said I need to have the new upgrade cingular 3G sim card for this service. Does anyone have an old ATT sim that works with the 3G service? Thanks

To directly answer your question, I have a TyTn with a old AT&T wireless SIM and it works fine with 3G on Cingular. So the answer is you don't need a new SIM for it to work. But you might run into the same problem I did. I previously had an 8525, bought just before xmas. I tried to unlock it with the free program offered here and was unsuccessful. It seemed like it was radio locked like the new Softbank X01HTs and I don't think there's a solution for that yet, or coming anytime soon. I ended up just returning the 8525 and buying an unlocked TyTn. It might have just been my bad luck with that one particular 8525, or it might be that Cingular is now selling all of them radio locked like the X01HT to prevent them from being SIM unlocked. I have no idea which case is true. Just a warning of what you might be in for if you don't buy an already unlocked 8525 or a TyTn.

[Lucas0511]

As I understood Cingular is now AT&T again starting Monday. Should help with compatibility, right :-) ?

[Maddog468]

I spoke to another Cingular/ATT agent last night about 3G service with the ATT sim. They said that it might work, but would work better with a Cingular sim. It depended if the old ATT towers had the 3G service installed on them. It sounded to me like they were guessing. I have a great ATT plan so I do not want to switch over to Cingular. Currently I have a I-mate K-jam with an ATT sim card and it works great with the Edge. On the subject of the TyTn I looked in to buying one, but if it breaks I have to ship it to Wales for warranty work according to HTC. I live in the U.S. So I was thinking about a JasJam or 8525. Thanks for your help

[GiODi]

My Tytn works on 3G with the old school AT&T sim. I can't really speak on the reliability because i was only in a 3G area for a brief enough moment to test it.

[derekmg]

I previously had an 8525, bought just before xmas. I tried to unlock it with the free program offered here and was unsuccessful.

Just call Cingular and ask them for the unlock code. They had no issues giving me the unlock code. Unlocked just fine.

[Maddog468]

Thanks for the info.. Seems like the customer service people are just trying to make me switch to Cingular.

[gmkelly001]

Just call Cingular and ask them for the unlock code. They had no issues giving me the unlock code. Unlocked just fine.

I tried that twice, maybe I was just unlucky again but they wouldn't give me the code either time. Doesn't matter now that I have a TyTn though.

[GiODi]

My boss just go the unlock code from cingular by saying that he travels to other countries a lot. They made him wait like 2 days and they emailed it to him.

[Maddog468]

Ok, One person says it does not work, one says it does. Does anyone else have any experience with this? Just would like to know for sure before I go out and buy it.

Thanks

[joedoe]

It does work for me just fine with white ATTW sim card. No problems whatsoever.

[marka2k]

Ok, One person says it does not work, one says it does. Does anyone else have any experience with this? Just would like to know for sure before I go out and buy it.

Thanks

I am using unlimited Mmode plan ($24.99) with a Blue ATT SIM older than the white SIM and it works with no problems.

[TheMaster666]

The new sim has more storage space on it.
That is all I know.

I'd really like to figure out what else is different as well.

[teambnet]

Same here. Getting UTMS/3G connection (comfirmed with 128k stream from radioio) with blue AT&T sim on a 24.99 unlimited mmode plan. HTC branded TyTN from egadgetdepot. What's more, my EDGE throughput is noticably higher than on my Treo 650.

[Maddog468]

Thanks for your help.

Some of you still have the 24.99 internet plan for smart phone. I think I pay something like 45.99 a month for my K-Jam. I had the 24.99 plan but they made me change it because I told them I had a K-Jam. I needed help configuring my K-Jam. The tech person told me I had the wrong plan and I would be charge a lot of money for have the wrong plan. Thats how they found out and I was unsure at the time so I just when with it.

Again, thanks for your help.

[TheMaster666]

I heard there was an Audit department which would find out..

I argued about the plan change myself for over an hour with them.

I had a PDA phone before and I did not have to switch..
I still got full internet and they didn't know JACK!

Anyway.. I got a credit of 20 bucks a month for 1 year..

So I am paying the same for unlimited except now I need to pay for Text Messages..

After the year is up I'll probably change the service again to something else..

[Maddog468]

They also were try sell a plan for my notebook computer for 70 bucks a month. Since then I have used my pda a modem and had no extra charges