Upgrading my 1st Gen Jailbroken IPhone to Version 3.1

Last week I followed the usual instructions to update the 1gen phone from 2.x to 3.1. I've listed the steps I followed. Details on each step can be easily found from web searches.

• Backup the Iphone settings using Itunes. Jot down all the apps downloaded via 3rd party installers like Cydia. You'll have to install these later after the upgrade.
• Download PwnageTool 3.1 via bittorrent
• From Itunes download the 3.1 software update
• Use PwnageTool expert mode to create a custom 3.1 .ipsw file. Keep all the default options, except make sure not to select Ivy app from the Custom Packages section. Failure to do this will mean Cydia Installer will fail to work.
• Take out the SIM (not sure if this helps)
• Put the IPhone in DFU Mode using PwnageTool
• Install the custom 3.1 .ipsw file using Itunes
• Restore the Iphone settings using Itunes
• Reinstall apps installed via 3rd party installers like Cydia. My favourites are BossPrefs and OpenSSH.
  

Surfing the web using EDGE stopped working after this upgrade. Modifying the carrier.plist file on the Iphone reveals the configuration option to edit APN/Username/password information.