SOUTH U.S. -- New Sim, New Sim Holder, NO SIGNAL.. Samsung Galaxy s3 sgh-i747

If I'm not missing anything, when you remove the SIM card from a phone, it will not work.

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A simple thing to overlook, but were the SIMS activated on your account? Before a SIM can work it must be activated by AT&T.


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Ah, ok. Maybe you can try to activate the SIM on a AT&T branded phone, then put it in your Galaxy S3.


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We'll then it is either the SIM adapter isn't allowing proper contact between the SIM & SIM tray, or their is a problem with the phone.


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Hi there, hope you don't mind my asking you a few questions so we could understand your problem better.

1. Why did you have to install a new SIM card and holder?

2. Did the S3 ever work that you know off?

3. If you have an AT&T phone and insert an AT&T SIM, the phone will automatically fill in all the APN information etc, you don't need to do any of that.

4. What happens if you turn off wifi and take out the SIM card, factory reset the phone and then insert the sim without turning wifi on or manually entering any information?



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It sounds like there is something wrong with your phone unfortunately. When you do a factory reset the settings should automatically fill on. Have you tried calling AT&T from a different phone or taking it in to a store?

Here are the settings per AT&T, hope it helps.

http://apn-settings.com/us/att-apn-settings/


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I am sorry, I can't think of anything else. I am surprised that AT&T told you that you have a bad SIM card holder and sent you off without offering any alternatives.


Maybe it is something simple and someone else has a suggestion but I personally think you have a bad phone and should look into replacing it.


Good Luck with whatever you choose to do.


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Are you saying that you had a new, not yet activated SIM, but it is showing no bars, so you can't activate it? Did you or the person at the AT&T store try inserting someone else's working SIM, to be sure the phone is OK? I'm not sure, but I heard that a not activated SIM will not show bars, even if service is strong, until after it is activated. If the person at the AT&T store did not actually go through the activation steps, give it a try, even if you do not see any signal bars.

When you said you get bars, was it WiFi bars or phone bars? I am assuming you can't make cellular calls at all, or is it just data that has a problem?

 

Go to this page and check or start your activation. I think the card has to be activated in the web first. Meaning set up your credit card, plan, etc

https://www.wireless.att.com/GoPhoneWeb/goPhoneLanding.do?method=activatePayGo

The att guy should have checked this for you. If you insert the sim and no errors show up like 'no sim card' then the adapter is okay.

If the two steps above are okay, then your phone is broken or possibly stolen and on a black list.




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Glad it finally worked, too bad about the plan change.

Thanks for your follow up post, enjoy your S3.


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Glad that it worked, activating. Yes, while in the att store they should have done the basics such as checking activation. Att is looking more stupid IMHO.


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The APN setting is only involved in data and MMS operations. Voice and SMS should work regardless of the APN settings.. A SIM card can be activated without a data connection to the telephone or even if the SIM card if not in the telephone. The activation is done at the carrier network level. Once the SIM is inserted into a telephone with the correct bands, the carrier network recognizes the SIM card. One is advised to turn off the telephone during the activation process. Remember that SIM cards were being activated long before mobile telephones had any data capabilities.