General

// Dispaly IMEI number
*#06#

// SAR values and regulatory label
*#07#

// Display phone information, battery &  history usage statistics
*#*#4636#*#*

// Engineering mode (Motorola)
*#*#2486#*#*
                  

Carrier Specific Unlock Codes

// Verizon Unlock Code
000000	or 123456			         

// Default Network Unlock Pin
    1234 T-Mobile
    1111 Verizon and AT&T

// Master Unlock Code
00000000 or 0000