Docs

The definitive guide to Phreak Boxes    by Elf Qrin	The comprehensive list of all the over 100 known phreaking boxes, with a brief description, and classified for similar boxes and aliases. Published on Spring 2002 issue of 2600 - The Hacker's Quarterly and linked from The Jargon File.
Phone Tones	The list of tones generated by the phone keypad (including special keys) and by the phone company.

Cellphones ESN Converter	Online tool to convert ESN (Electronic Serial Number). The ESN is a serial number assigned to any cellular phone number to make it virtually impossible to clone.
Free GSM SMS messages	List of free SMS gateways all over the world.

Ring Tones for Nokia A-L / M-Z	Collection of ring tones for Nokia cellular phones.
Ring Tones for Ericsson A-L / M-Z / Themes-Anthems	Collection of ring tones for Ericsson cellular phones.
Ring Tones for Siemens A-L / M-Z	Collection of ring tones for Siemens cellular phones.