Assorted Stuff

Flaw in ESN/MIN tracking creates opportunities for hijacking and denial of
service attacks.

Free Cellular Phone Calls Without Cloning

General Packet Radio Service, A Guide to

Cell Intell (ESN's, SID's, IRM(IN)'s and SOC's(CODES))
IRM / MIN-Codes Cellular Documentation
List of ESN Prefixes Sorted by Manufacturer

Mobile Phone ANI-Diversion Technique

Radio Direction Finding With PCS/GSM Mobile Terminals: Bunny Hunting the Cell

Tracfone Trap: Why Tracfone sucks ass.
Additional TracFone Documentation.