NEC DB2000 Secrets (also work on other models)

See IMEI code
*#06#
Reset to defaults
*73738#
Show Software version
*#2820#
SP Lock info
The procedure will show if your phone is locked.
*#3210# for SIM lock info,
*#8140# for Net lock info.
SIM lock
*#4960 # – Inquiry * 4960 * password * password # (send?) to Lock
#4960* password # to Unlock
[password] is an 8 digits number
Net Lock
*#7320# – Inquiry * 7320 * password * password # to Lock.
#7320* password # to Unlock.
[password] is an 8 digits number
Net Lock 2
*#2220# – Inquiry * 2220 * password * password # to Lock
#2220* password # to Unlock
[password] is an 8 digits number
ü Subnet Lock
*#1110# – Inquiry * 1110 * password * password # to Lock
#1110* password # to Unlock [password] is an 8 digits number