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How to jailbreak the iPhone 3G 4.2.1 with baseband 5.15.04 for use with a T-Mobile prepaid SIM.

Obtain T-Mobile SIM
Download the 4.2.1 IPSW Firmware (download)
Download and run redsn0w to jailbreak
– use above IPSW file when requested
– Options: Install Cydia (required), Install iPad baseband (required), Enable homescreen wallpaper (optional)
From Cydia, install UltraSn0w to unlock
Update MMS settings for T-Mobile

Phone should now be on the T-Mobile network with the ability to send text and MMS messages.

Import/recover old SIM contacts (optional)
– Install old/obsolete SIM card
– Go to Settings -> Mail, Contacts, Calendars -> Import SIM Contacts

http_port 1863
visible_hostname echelon
acl borg src 208.248.33.30/16
http_access allow borg

So, your company has been acquired. If climbing inside an escape pod and jettisoning your self into deep space is not an option, here is a list of things to expect:

• An order will be made to lower your firewalls and surrender your servers.
• You will be assimilated.  Resistance will only slow the process down.
• Assimilation is a means of adding or replacing spent drones.
• The Borg have no feeling, no emotion, no individual thought.
• Each Borg is part of a giant subspace communications network called Exchange Server.
• All communication is transmitted to the entire Collective via a process entitled Carbon Copy.
• Your present function and title is irrelevant.
• Strength is irrelevant.
• Negotiation is irrelevant.
• Freedom is irrelevant.
• Self-determination is irrelevant.
• Your life as it had been is over.
• From this time forward, you will service them.
• Your culture will adapt to service them.
• They will add your biological and technological distinctiveness to their own.
• Resistance is, and always has been, futile.
• You will become one with the Borg.

UNIX Administrators: Saving servers from nefarious end-users since 1969.