Mobile data network loss but with signal bars

i keep trying to send text messages or make phone calls but they keep failing and returning a message saying unable to connect to data network, i thought that only applied for internet services? its saying i have atleast 3 or 4 bars of signal when i do this. any ideas?

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https://talk.sonymobile.com/t5/Xperia-Z3-Z3-Dual/lollipop-upgrade-mobile-data-doesn-t-work/m-p/96916...
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HT201699 I'm using an iPhone 4 which i purchased last month, there seems to be some kind of problem with the mobile data network

Hi,
I bought a new iPhone 4 last month, totally fell in love with it untill there was this problem regarding the apn disappearing. I manually added the apn info and it worked fine for some time but soon after I disabled the mobile data/3g connection and enabled it later I always use to get a msg saying "Could not activate mobile data network" even after it being active( 3g symbol always used to be poped up at the top). Though the apn is filled with a valid data it shows me the same msg over and over again. It some times works on rebooting but the rebooting the handset everytime i want to use the connection sounds very pestering. Please suggest me with somehting to get rid of this problem...

https://discussions.apple.com/message/21946322#21946322

What's wrong with my mobile data network?

I've had this 2nd hand iPhone 4 for almost 2 months and everything has been working perfectly until today. I was using viber and sending messages to my friends and it suddenly stopped working and i have no idea why, i thought i just lost my 3G for a while so i waited a few hours for it to come back up, this started around 3pm and it's 12am right now and it's still not working... Everything else worked such as skype, twitter and the internet but for some reason i couldnt send and receive messages on viber and imessage. I also didn't get any notifications from ANYTHING during the whole time until i connected to my wi-fi at home which i then got flooded with messages, tweets and etc.
I think that theres something wrong with my mobile data network and i dont really know what it is since everything was working fine this afternoon and it just suddenly stopped? Connecting to Wi-fi makes everything work fine and i actually receive notifications and am able to send and receive messages to my friends on viber and imessage.
Can anyone help me?
My carrier is CSL and it has unlimited data if anyone n

I havent contacted my carrier and i really dont think they will be able to help since i go to them every month to pay my phone bill and they can barely speak english...
I've turned my phone on and off 3 times and ive also reseted my network settings

My iphone4 says its cinnected to 3g but when i use safari it says "could not activate mobile data network". Any ideas please?

my iphone4 says its cinnected to 3g but when i use safari it says "could not activate mobile data network". Any ideas please?

Further, if you are not in your home cellular carrier's area, you need to set Settings > General > Cellular > Data Roaming = "On".

I bought an unlocked 3G and when I try to use the internet, it says 'Could not activate mobile data network'.

Hi all,
I have recently acquired an iPhone 3G 16GB. It is unlocked and I have put my sim card in (Virgin Mobile) and used it without problem when calling or sending text messages. The internet all works fine when connected to a wi-fi network.
In the top left hand corner it says '3G', however if I try anything related to the internet (Safari, Twitter etc.) a message will appear reading 'Could not activate mobile data network'. This is very inconvenient for me. All internet related activities work fine when connected to a wi-fi network.
Is this a problem with all unlocked phones? Is there a solution to this? Or am I simply unable to use the internet without wi-fi on this model?
Any help would be greatly appreciated, all questions may sound silly, but this is my first iPhone and I am very inexperienced with them!
Thanks

First, you don't have a 3G if you have iOS 6.1.4. The 3G cannot go higher than iOS 4.2.1. That is not related to your problem, but worth knowing.
Let's try the obvious first. Tap the Settings icon. Then tap General. Then Cellular. Is Cellular Data on? Is there an entry for APN? If there is contact your carrier and ask what the APN settings should be. If there is no entry don't worry; the APN is automatic with your carrier.

Cannot find 'Mobile Data Network' button for iphone 4 using virginmobile.

Hi,
I use an unlocked iPhone 4 with the latest 7.1.2 iOS. (At least the latest you can get for that phone.)
I recently switched from O2 to Virginmobile to get better coverage. (The EE network is so much better.)
However I cannot send MMS and emails (whether I'm connected to WiFi or not). I cannot access internet when I'm not connected to WiFi.
I have called 789 at least twice to get this resolved. Each time they failed because of the missing button: 'Settings/Mobile/Mobile Data Network'.
Cellular Data Network etc is not there either. I cannot find the button anywhere.
Virgin did give me the details of what to enter should I one day find a way. Although I had got this off the internet already. I was calling them because I cannot find that button! They seemed to expect it to be there.
I have tried resetting all settings and also resetting just the network settings.
The button was available when I was using O2. MMS, email, internet all worked fine because I could set it up manually. The button dissappeared when I switched to Virgin.
So my questions:
Should I be able to see this button?
If yes, what has gone wrong?
If no, how can I set the apn etc settings correctly?
Please note that I have contacted Virgin via the community forum and over the phone to no avail. They suggest I talk to Apple to see if they know why the button has disappeared. They suggest it may be because the iphone has been unlocked.
My household has an iphone 3gs, two 4 and one 4S. All seem to be missing the button or equivalent.
Any help gratefully received.
Regards,
Ronnie

What does it say in your "About"? Go to settings>General>About and it should tell you your carrier. If you have carrier service but it does not show, you might want to contact them again. If the carrier name shows, but you do not get service, try Settings>General>Reset>Tap Reset Network Settings. You will need to enter your wifi password back in afterwards.

My HTC One m8 is not connecting to the mobile data network.

WiFi works, I can make phone calls, but I can't access internet at all while not connected to WiFi. yes, mobile data is on (but disconnected). I've tried LTE, CDMA, Global, and no available network mode works at all. Please help =(

Hi patient.zer0!
Sorry for any trouble with your data. Let's look into this OK? Please turn on your mobile data and try again to access the internet. When accessing the internet, either Wifi or VZW data has to be turned on.
Let me know how this goes, thanks!
ChristinaB_VZW
Follow us on Twitter @VZWSupport

TS4148 I need to change the mobile data network from Vodafone to orange I need the passwords and address to do it my self

I'm trying to find out the mobile data network info on my iPhone 3GS it's on Vodafone at the moment but I want to use my orange sim so I need to change the pan details help

Assumption ...you are in UK
If you purchased the iPhone from Vodafone it will be locked to them
You will need to request they unlock the iPhone before you can use
it on Orange no other way
In UK Apple are the ONLY source of unlocked new iPhones

After update 4.2.1 unable to access mobile data network

Hello,
yesterday, i have updated to 4.2.1
Today, i have activated the flight modus for a while...
Then go back into the normal modus (flight modus off). Now, the access to the mobile data network is never possible. Access via WIFI is allways ok.
Now, i have made the same with a second 3GS with 4.2.1 and the problem is reproducible. Message > " mobile data network could not be activated "
thanks in advance for help...
Th

Settings>General>Reset>Reset Network Settings...see if that helps.

02 carrier logo but no signal bars?

I have changed my network provider to 02 from vodafone and have had apple unblock the phone and have connected to itunes to reset the phone however i am still just getting 02 carrier logo but no signal bars?

Hi there,
You may find the troubleshooting steps below helpful.
iPhone: Troubleshooting No Service
http://support.apple.com/kb/ts4429
-Griff W.

Could not activate mobile data network - iPhone 3GS

Hi, I really need some help please.
Last week I started to get this message everytime I tried to use internet services, email, web or apps. I was on 4.1.2 and the phone was officially unlocked and running a T-Mobile sim with auto-update carrier file installed.
I reset the phone, restored it and never worked, subsequently, I have done this many times, reset network settings, hard reset, soft reset and I eventually upgraded to 4.2.1. This still never solved the issue.
After countless restores and resets and iTunes updating the carrier files, nothing is working. I contacted T-Mobile who said there are no connectivity issues, must be the handset. I then contacted Apple who advised the handset is out of warranty and an 'out of warranty' repair will cost minimum £146.
The phone works fine calling, messages and on Wi-Fi it's only internet services that do not work. Is there anything else I can try or has anybody experienced the same problems?

Thanks for the advice. That was one thing I hadn't tried purely becuase it is such a pain in the ***. I reset the phone and set it up as a new one and bingo, it worked fine. I then went to restor from backup, after which, same issue, Could not activate mobile data network, so another reset and now I'm pretty furious that all my phone contacts, apps and messages have all gone.
Next question would be how to transfer phone contacts from phone to sim. I have lost all new numbers that have gone into the phone for the last year, so if I reset again, restore from backup, transfer numbers to sim, then reset again and set up as new phone I should be able to recover numbers at least.
<Edited by Host>

Since upgrading my iPhone 5 to ios 7, I cannot get the internet, email to work on 3g. I get the message ""could not activate mobile data network. You are not subscribed to a mobile data service". How do I fix it?

Since upgrading my iPhone 5 to ios 7, I cannot get the internet, email to work on 3g. I get the message ""could not activate mobile data network. You are not subscribed to a mobile data service". How do I fix it?
I've contacted o2, tried all of their suggested updates and changes, reset my phone 3 times and still no luck.
Any help appreciated.
Thanks,
Louisa

Hi, l have the same problem, were you able to resolve?

Mobile data network setting

The settings for the mobile data network (APN, User Name, MMS etc.) disappear from time to time for unknown reason.
What can I do to prevent this?

agree m also having same problems and same notifications...

Why my iPhone 4s no mobile data network

Why my iPhone 4s no mobile data network?

Did you make sure that in Settings/General/Network/Mobile Data is switchen to ON?

WIFI and mobile data connections not connecting with any other outside WIFI networks. Bluetooth not working in car. Any solution?

After installed iOS7 I am facing the following two problems:
1. WIFI as well as mobile data connection are working fine at my home. But, not connecting with any other outside WIFI networks. Error message is 'unable to join network'. Mobile data also not connected outside my home. Sometimes wifi and mobile data connect outside my home when I turn off and on the phone.
2. Bluetooth, in my car, paires well and incoming and out going calls can be received and made. The problem is no sound out put from speakers.
Apple please make note of the above problems (of million people) and give solution before giving any other updations for painting and tinkering the screens.

Check this thread, the same solution might work for you:
http://discussions.nokia.com/t5/Nseries-and-Symbian-Smartphones/N8-111-040-1511-Wifi-and-mobiledata-...

Mobile data network loss but with signal bars

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