iPhone can't receive calls while receiving EDGE data

iPhone can't receive calls while receiving EDGE data

Summary: Have people been telling you that they always go directly to your iPhone's voicemail box? You probably have been using the unlimited EDGE data a little too much and need to lay off it a bit.

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AT&T logoHave people been telling you that they always go directly to your iPhone's voicemail box? You probably have been using the unlimited EDGE data a little too much and need to lay off it a bit.

The problem is that iPhone can't always receive incoming calls while it's transferring data over the EDGE network and EDGE can't be accessed while on a voice call–depending on which network you're on that is.

Apple Knowledge Base article #305711 states:

While iPhone is actively transferring data over EDGE—downloading a webpage, for example—you may not be able to receive calls. Incoming calls may go to voicemail.

iPhone Atlas reports that the issue has to do with what type of EDGE network you're connected to.

The “may not be able to receive calls” portion stems from the fact that there are two types of EDGE network types, NOM1 and NOM2. When your iPhone is connected to a NOM1 network, the data transmission will generally be interrupted, and the incoming call allowed to come through. When your iPhone is connected to a NOM2 network, however, the EDGE data transfer process cannot be interrupted, and the call will generally go to voicemail.

You can you tell which network you're connected to by dialing *3001#12345#* and tapping Call to bring up the Field Test Mode. From there select GPRS Information and find the entry for nom. A 1 in this field indicates a NOM1 network connection a 2 indicates a NOM2 network connection.

Since I learned about this over the weekend I've never been on anything but a NOM2 GPRS connection. Given my obsession with iPhone data, it now makes sense why I've been missing all these calls.

What about you, have you ever been connected to the mythical NOM1 GPRS network?

[poll id=58]

Topics: Networking, iPhone, Mobility

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7 comments
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  • I think your title to this blog...

    Even withing the blog you state the iPhone can receive calls while downloading edge data, it just depends on which network you are connected to. This appears to be more of an AT&T service provider issue.
    mrlinux
    • oops

      I dont think your title for this Blog is correct
      mrlinux
  • What a great phone!!!

    Didn't Apple test this phone at all before releasing it on their sheep?
    NonZealot
  • iPhone can?t receive calls while receiving EDGE data

    Pixels are free...so why not title the article:
    iPhone SOMETIMES can?t receive calls while receiving EDGE data
    phillip@...
  • Again, this points out the...

    need for accurate headlines.

    How about this:

    "Mobile phones can't receive calls while using AT&Ts NOM2 Network."

    Much more accurate, wouldn't you say?

    If you did this you wouldn't make people like Zealot, who only read headlines, and
    don't really understand the article, look like fools (again).
    msalzberg
  • RE: iPhone can't receive calls while receiving EDGE data

    How do we change from NOM 2 to NOM 1?
    Migi Small
  • RE: iPhone can't receive calls while receiving EDGE data

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