Losing your EDGE/GPRS setting on iPhone after 1.1.1 upgrade?

[Kieron]

(Although I am compiling an FAQ covering such subjects it may be after the weekend before I get it finished - until then, here's another helpful tip!)

An issue I noticed with the v1.1.1 update is that the carrier EDGE settings are no longer permanently saved when entered through the Settings->General->Network->EDGE screen.

Basically, whenever the iPhone is restarted or rebooted, the EDGE settings disappear.

The solution to this for me was to SSH/SCP into the iPhone and edit the /var/root/Library/Preferences/com.apple.carrier.plist file. This file should already be in XML format, and shouldn't need to be converted.... Just look for the section that specifies the APN settings and fill in the blanks appropriately, for example:

Code:
<array>
<dict>
<key>apn</key>
<string>mobile.o2.co.uk</string>
<key>password</key>
<string>faster</string>
<key>username</key>
<string>web</string>
</dict>
<dict>
<key>apn</key>
<string>mobile.o2.co.uk</string>
<key>password</key>
<string>faster</string>
<key>username</key>
<string>web</string>
</dict>
</array>

(The above settings are for o2 -- obviously if you're on another carrier you will need to enter the APN settings appropriate for your carrier).