HT4839: iOS: Editing APN settings using iPhone Configuration UtilityLearn about iOS: Editing APN settings using iPhone Configuration Utility
Currently Being ModeratedHT4839 Re: My iphone keeps saying "Only one APN configuration can be installed at a time". Please help!Oct 11, 2012 12:03 PM (in response to rambinca)
After googling and seeing lots of info, I figured out how to get Internet on your Iphone 5 back.
I was also trying with iPhone Configuration utility, but the phone didn't allow me to install the new profile as I already have certificate with APN settings.
I have an issue with my previous mobile operator KPN (Netherlands). APN settings of KPN ovewrite the data of all sim cards I use. And I need always manually to edit it. With my current operator T-Mobile, I can't edit APN settings as these settings are hidden.
This solution will leave you with all your data. Very easy one!!!
1) Use other sim card, where operator allows to edit APN settings.
2) Navigate to Settings - General - Mobile data - Mobile data network- Here you can edit APN, MMS, etc...
3) At this point do not navigate out of this menu and eject the alternative sim.
4) Insert your sim card.
5) Edit all settings you need. Make sure they are correct. Lots of info on google.
For me it worked fine. Although I expect till the next time I change sim. You might try to do it several times as Mobile data network menu can be hidden when you install your sim card.
Currently Being ModeratedHT4839 Re: My iphone keeps saying "Only one APN configuration can be installed at a time". Please help!Oct 11, 2012 12:07 PM (in response to rambinca)
AT&T will not allow you to make APN changes. They are set with the carrier file. Make sure that MMS is turned on and that iMessage is activated. If there is not change after resetting the phone, contact AT&T and have them check your account to make sure everything is okay on their end. I have a 4S with AT&T and have not experienced any issues with SMS, MMS or iMessage. I believe the reset or the call to AT&T should rectify your problem.
Currently Being ModeratedHT4839 Re: My iphone keeps saying "Only one APN configuration can be installed at a time". Please help!Oct 17, 2012 6:51 AM (in response to ChrisJ4203)
Appears the fix for my phone was a factory reset and then turning off mms, restarting phone, and then turning mms back on. Seemed to work until I tried to restore my phone to a backup and then problem reappeared. Looks like I will have to do another factory restore to get my mms working again.
Currently Being Moderated
I had the same problem. I caused it when I originally added a fake APN so that I would not get random downloads from the internet on my first gen iphone. ( It did not have the feature at the time to force all data traffic over wi-fi.) I have since recieved an iPhone 4 which worked perfectly (internet, text, MMS, etc..). I restored it using the profile which I neutered. The result was that I had no internet connection and iMessages has been delaying messages upward of a day. I can no longer go in and switch the fake APN off as that feature has been suppressed by AT&T. Going back to www.unlockit.co.nz and changing the APN did not work, because it detected the existing APN and could not write over it or remove it. Using the Apple Configuration Utility had similar limitations. The only way to get around this is to wipe the iPhone clean, add software and wi-fi passwords back manually and avoid restoring from the old back-ups. Oh well such is life.