* the same file with more features enabled (see next section): [Download here]({{ site.url }}/assets/tmobile_germany.ipcc)
Details
=======
If you look at the `.ipcc`-file you'll notice that it's a standard ZIP archive. Inside you'll find a folder `Payload`
and a folder with your carrier's name. There you'll find a file `carrier.list` along some others. It is an XML file
with all the features for your carrier. Some interesting snippets:
{% highlight xml %}
<key>AllowEDGEEditing</key>
<true/>
<key>AllowMMSCEditing</key>
<true/>
<key>AllowMMSEditing</key>
<true/>
...
<key>ShowCallForwarded</key>
<false/>
<key>ShowCallForwarding</key>
<false/>
<key>ShowTTY</key><!-- Show options for TTY devices -->
<false/>
...
<key>SupportMMS</key>
<true/>
...
<key>SupportsNITZ</key><!-- Network Identity and TimeZone (time synching via carrier) -->
<false/>
{% endhighlight %}
You can upload the `.ipcc` file using the Developer version of iTunes 8.2.0.10[^1]. Or you can upload the file to a
webserver and download it to your phone. There's also the possibility of creating a single merged XML file which then
must be sent using the MIME type `application/x-apple-aspen-config`.
MMS Settings
============
The carrier file for T-Mobile Germany doesn't contain the MMS settings. So go to *Settings* → *General* → *Network*
→ *Cellular Data Network* and input the following under the **MMS** section:
* **APN:** `mms.t-d1.de`
* **Username:** `t-mobile`
* **Password:** `mms`
* **MMSC:** `mms.t-mobile.de/servlets/mms`
* **MMS Proxy:** `172.28.23.131:8008`
* **MMS Max Message Size:** 300
* **MMS UA Prof URL:** *\<leave blank\>*
[^1]: Or change the shortcut to iTunes so that it reads: `...\iTunes.exe" /setPrefInt carrier-testing 1`, Mac users run `defaults write com.apple.iTunes carrier-testing -bool TRUE`
