5 Replies Latest reply: Jul 13, 2010 9:20 AM by Testemonial MAC convert
Testemonial MAC convert Level 1 Level 1 (0 points)
Big dilemma. I purchased an iPhone when I was in Australia. In Australia, all phones are factory unlocked. I brought my iPhone 3Gs 32 Gig back to the states with me and since I had a T-Mobile account, I inserted my SIM card and use it on my T-Mobile network. i have had this phone since January 2010 and it worked perfectly fine. Until recently. When I upgraded the phone's software to 4.0 it started to lose the data network and only voice and texting works. I called Apple and they walked me through several different fixes only to figure out it is not a phone issue, it is a T-Mobile issue. How they were able to determine this was simply by putting the phone on WiFi and the data side of things worked just fine over WiFi ( I was able to get my email and use Safari when in WiFi mode but not in the data network mode).

I called T-Mobile and they have tried to troubleshoot it. First though, you need to understand the basics from T-Mobile that make the iPhone work on their network. It only works on T-Mobiles Edge network, not 3Gs, which is what I knew since January and I am fine with that. To get it to work on the T-Mobile network, you have to turn off 3Gs AND WiFi, and you have to set your APN found under Cellular Data Network to be epc.tmobile.com leaving the user name and password fields blank, then make sure Data Roaming is on and Cellular Data is turned on. Doing this makes the Edge network appear just fine. This is how it was working up until iOS 4.0. Now, I can not get onto the Edge network.

At first, T-Mobile told me it was an issue with the towers since there were outages in my area due to maintenance upgrades on the radios in the tower. But this has been over 10 days and the work on the towers is completed AND the entire time my wife has a blackberry and she gets data just fine. Then we tried resetting the entire network settings on the iPhone and re-establishing them. Still no network appears. Finally today i did a complete Restore of my iPhone and after all that work, still no network. All I can do is voice and text messages.

Does ANYONE know what may be going on here?

iPhone 3Gs 32 Gig, iOS 4
  • Allan Sampson Level 10 Level 10 (123,375 points)
    Although your iPhone is a 3GS, you turn off 3G network access, which shouldn't be required since AT&T's 3G network isn't available everywhere. When I'm in an area where AT&T's 3G network isn't available, I don't need to turn 3G network access off. The iPhone will connect to the fastest network available - 3G > EDGE > GPRS. Having 3G network access on should not prevent the iPhone from connecting to the EDGE network, but may be required when connected to T-Mobile's network in the U.S. since T-Mobile is not an official carrier for the iPhone.

    The problem lies with T-Mobile. If there are any changes involved with firmware update 4.0 that T-Mobile needs to account for with the iPhone, it is up to them.
  • Testemonial MAC convert Level 1 Level 1 (0 points)
    The reason why you have to turn off 3Gs is because T-Mobile does not support iPhones 1700 something or other. You have to turn off the 3Gs on the iPhone to make it work.

    The question then is, how do I get T-Mobile to recognize that there is something they need to do to adjust for the new firmware? I have talked and talked to their technical people over the phone and not sure I am hitting the right person.
  • Allan Sampson Level 10 Level 10 (123,375 points)
    The reason why you have to turn off 3Gs is because T-Mobile does not support iPhones 1700 something or other. You have to turn off the 3Gs on the iPhone to make it work.


    As already provided, it shouldn't matter since the iPhone is designed to automatically connect to the fastest internet connection available. If wi-fi access and 3G network access is on, when in range of an available wi-fi network you have access to and have connected your iPhone with previously, the iPhone will connect to the wi-fi network automatically. When leaving the range of the wi-fi network, the iPhone will connect to the 3G network if 3G network access is available. If 3G network access is not available, the iPhone will connect to EDGE or GPRS - whichever is available at the time.

    If this is unique to T-Mobile's network with the iPhone for some reason since T-Mobile is not an official carrier for the iPhone in the U.S. and you were instructed by T-Mobile to do so, then you need to do so.

    If this is not working now, the problem lies with T-Mobile and I have no idea what to tell them for them to recognize where the problem lies on their end.
  • MambalamMachan Level 1 Level 1 (0 points)
    My internet access stopped working since yesterday as well. I have an 8GB iPhone 3G. I have been using EDGE on T-Mobile network for the past 1 year. I can see that my phone is getting an ip address but I am unable to connect to the internet.

    Anyone else facing the same issue?
  • Testemonial MAC convert Level 1 Level 1 (0 points)
    I just spoke with someone from T Mobile. Seems my Edge network is up and running again on my phone. Turns out it was a tower issue that they were performing maintenance / upgrades on and it effects some phones and not all. It did effect the iPhone for some reason unknown. So far, I have been on the data network for 24 hours now and no problems