Jason D. O'Grady
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iPhone cant receive calls while receiving EDGE data
Posted by Jason D. O'Grady @ 5:53 am
Categories: iPhone, AT&T, iPhone Diary, EDGE
Tags: Apple iPhone, Network, EDGE, Jason D. O'Grady
In Focus » See more posts on: iPhone
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Have people been telling you that they always go directly to your iPhones 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 cant always receive incoming calls while its transferring data over the EDGE network and EDGE cant be accessed while on a voice calldepending on which network youre on that is.
Apple Knowledge Base article #305711 states:
While iPhone is actively transferring data over EDGEdownloading a webpage, for exampleyou 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 youre 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 youre 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 Ive never been on anything but a NOM2 GPRS connection. Given my obsession with iPhone data, it now makes sense why Ive been missing all these calls.
What about you, have you ever been connected to the mythical NOM1 GPRS network?
Which NOM are you connected to right now?
NOM1
NOM2
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