Could not activate cellular data network att 3g after upgrading form 5.1.1 to 6.1

Hello im deployed in Afghanistan. I brought over my 64gb ipadw att over here. I got a new sim for it day one. It's work flawlessly for 2 months. Last night I upgraded from 5.1.1. to 6.1 and when it woke back up BOOM! I have all the bars along w/ the "E" Edge network icon but no internet. Says could not activate cellular data network. When I put my att sim card in my ipad works perfectly fine racking up ridiculous out of the country roaming fees. Why did my hodgi sim card stop working?

I am having similar problems.
My network settings are correct and I can communicate both over 3G and WiFi.
However, every few minutes the connection is being dropped. A few seconds later it's back again. I can see this in an application I am developing. It's rather frustrating...
In the console I see this message prior to the connection being lost and rebuilt:
"Mon Sep 20 09:44:58 PeterVs-iPhone-3GS configd[23] <Notice>: network configuration changed."
I have not changed anything to the configuration. What's even more strange is that I ONLY have 3G at this moment, i.e. WiFi is disabled.
What is changing the network configuration? And why does it mean that the current network connection needs to be torn down and rebuilt? After the network is back, there is no difference than before. So it gets torn down and rebuilt for no apparent reason.
I have logged a bug with Apple over a week ago, but haven't had any reply from them yet. I need more information about what is happening, and how I can prevent it. I'm not very happy having to grope in the dark, having to make guesses because somebody decided that he knows what's best for me.
This is happening on multiple iPhones with multiple different OS-es. So I am guessing it is related to my carrier (Vodafone). But I can't verify it because I'm not getting the tools from Apple.

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I should point out that it worked when the iPhone was set back to factory settings, but when restored with the backup, data/internet no longer works again, and I get the "Could not activate cellular data network" error message yet again.

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I was using an att's prepaid gophone and just bought an iphone 6 plus yesterday. but it shows that "could not activate cellular data network" even if "at&t 4g" logo shows on the top of the screen.
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I am absolutely getting LTE. From the iPhone 5S on, the GSM and CDMA phones had identical GSM radios ostensibly for overseas use (in the case of the Verizon phones). Verizon tells you they're only unlocked for overseas so that you won't leave their service for a domestic GSM. Actually, all of the 6's have identical receivers, however the CDMA antennae are disabled on the T-Mobile and AT&T versions... which doesn't matter anyway because Verizon and Sprint won't activate devices that did not originate on their networks though theoretically you could run on Verizon LTE with a GSM only phone as GSM is required for LTE (thus the SIM card in later model Verizon phones).
The Verizon model is the best of everything because it is completely unlocked for any carrier (except Sprint, but who cares, right?).
Edit: forgot to mention... Verizon is required to make all of their LTE phones GSM-unlocked as per their agreement with the FCC when they were acquiring LTE technology.

HT4623 My new iPad can no longer connect to the 3G network. I keep getting the message "could not activate cellular date network".

I updated my new iPad to the iOS 6 while connected to wifi. However, it will no longer connect to the 3G network. I keep getting the message "could not activate cellular data network" even though the 3G symbol appears normal. I have tried rebooting, but it still doesn't work. Please help!

No. You can't

How to solve the error message "Could not activate cellular data network: PDP authentication failure"when using 3g or gPRS on safari with an iphone 4 and latest software updates

Please can someone help me to solve the error message "Could not activate cellular data network: PDP authentication failure"when using 3G or GPRS on safari with an iphone 4GS and latest software updates. I have tried resetting the network and phone settings. I have restored the factory settings on itunes and still the problem persists.

All iPhones sold in Japan are sold carrier locked and cannot be officially unlocked by the carrier. If you unlocked it, it was by unauthorized means (hacked), and support cannot be given to you in this forum.
Hacked iPhones are subject to countermeasures by Apple, particularly when updating the firmware. It is likely permanently re-locked or permanently disabled.
Message was edited by: modular747

HT4623 Hi. After I updated ios6, I couldn't use my cellular network. It said "could not activate cellular data network - You are not subscribed to a cellular data service". I don't know why. My iphone is 4s

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Contact your carrier to ensure data access via their network is provisioned properly for your account and iPhone with the new iOS 6 update installed.

Could not activate cellulare data network??? what is the solution please.

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I had the same issue "Cannot Activate Cellular Data Network" sometimes says "No Internet..or You are not subscribed to a Data Network". The phone works fine on WiFi.
I noticed this issue only yesterday when tried to access my emails via 3G Data, this may have started happening when I recently updated to 4.3.2 and my phone has never been Jailbroken.
I found a fix that worked for me..I'm using T-Mobile Germany.
Go to Settings>General>Reset>Reset Network Settings>enter Pin code if you have lock enabled>choose Reset Network Settings..
Remember doing this may also erase known WiFi networks, so you may have to enter the details again to get connected to a known WiFi network.
My 3G data started to work again after I did the above steps to default factory network settings.
T-Mobile Germany wasn't much help at all. All they could tell me was some crap about my config was in the wrong contract, Duh??
They probably did nothing to fix the issue and I suspect the above resets steps resolved it for me. Give it a try..
Cheers!!

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I am getting an error message with my iPhone whenever I try to access my data with no wifi. It says "could not activate cellular data network". This just started today and has never happened before. Did I change a setting or something?

Hello, romac12.
Thank you for visiting Apple Support Communities.
I have experienced this issue before. If there have been any changes to your cellular account such as adding a line, plan change or upgrade, more than likely there is a provisioning issue on the carrier end. However, I would recommend going through the troubleshooting steps in the article below. If the issue persists, see step 9.
iPhone: Troubleshooting a cellular data connection
http://support.apple.com/kb/ts3780
Cheers,
Jason H.

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contact your phone carrier as they handle cellular network.

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Where did you purchase it from? There are lots of iPhones sold as "unlocked" which are carrier locked phones that were hacked and are not officially unlocked. These phones are subject to re-locking to the original carrier, particularly when updated.

When trying to use internet without Wifi I get a "Could not activate cellular data network - PDP authentication failure". What is the solution?

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I Have a iPhone 4s and I keep getting this error "Could not activate cellular data network" I have sprint and to use any internet om my iphone i have to connect to wifi. What do i do to fix my celluar connection. I took my sim card and put it back in.

I Have a iPhone 4s and I keep getting this error "Could not activate cellular data network" I have sprint and to use any internet om my iphone i have to connect to wifi. What do i do to fix my celluar connection. I took my sim card and put it back in and it still didnt work.

Davidb24 wrote:
Ok but im not the one who pays tge sprint bill
Apparently, no one pays it... That's why they shut off your service.

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I am absolutely getting LTE. From the iPhone 5S on, the GSM and CDMA phones had identical GSM radios ostensibly for overseas use (in the case of the Verizon phones). Verizon tells you they're only unlocked for overseas so that you won't leave their service for a domestic GSM. Actually, all of the 6's have identical receivers, however the CDMA antennae are disabled on the T-Mobile and AT&T versions... which doesn't matter anyway because Verizon and Sprint won't activate devices that did not originate on their networks though theoretically you could run on Verizon LTE with a GSM only phone as GSM is required for LTE (thus the SIM card in later model Verizon phones).
The Verizon model is the best of everything because it is completely unlocked for any carrier (except Sprint, but who cares, right?).
Edit: forgot to mention... Verizon is required to make all of their LTE phones GSM-unlocked as per their agreement with the FCC when they were acquiring LTE technology.

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Hello there, Krasea.
The following Knowledge Base article offers up some great recommendations for troubleshooting issues with cellular data connections with your iOS device:
iPhone: Troubleshooting a cellular data connection
http://support.apple.com/kb/ts3780
Follow these steps for help troubleshooting cellular data issues on your iPhone. After performing each step, please test to see if the issue is resolved.
Toggle airplane mode: Tap Settings, turn airplane mode on, wait three seconds, and then turn off again.
Restart your iPhone.
Make sure that your software is up to date:
Check for a Carrier Settings Update: Tap Settings > General > About.
Check for an iOS Software Update: Tap Settings > General > Software Update.
Note: Some updates may require a Wi-Fi connection.
Remove the SIM Card and reinsert it. Allow the iPhone to acquire the network again.
If your SIM card has SIM PIN enabled, try turning it off: Tap Settings > Phone > SIM PIN.
Try another location. If a different location works, but the original location still doesn't, contact your carrier to report the issue.
Reset network settings: Tap Settings > General > Reset > Reset Network Settings.
Restore the iPhone as new.
Contact your carrier to:
Verify that the iPhone is properly set up on the account with the appropriate, current data plan.
Verify that there are no account-related blocks.
Find out if there are specific error messages in the carrier logs that could help determine why the issue is occurring.
If none of the above steps resolves the issue, contact your carrier, make an appointment at an Apple Retail Store, or contact AppleCare to troubleshoot further.
Thanks for reaching out to Apple Support Communities.
Cheers,
Pedro.

Could not activate cellular data network on Verizon

I have an iPhone 4 on the verizon network. Whenever I try to get online or check my email's or anything when I don't have wifi it says Could not activate cellular data network. I have called Verizon and they kept me on the phone for 2 hours and had no solution. I have reset the phone/network and have restored it and nothing has changed. Any help would be greatly appreciated!!

I'm having the same problems. No luck with network resets, *228/2, data roaming etc. Good Verizon signal but no connection to 3g. I called Verizon and they suggested replacing the phone. The tech said he had seen a few iphone 4S with this problems so far. Now I don't know whether to replace it through Apple or Verizon since I was able to add Applecare+ to this phone.

Could not activate cellular data network att 3g after upgrading form 5.1.1 to 6.1

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