The best China mobile secret codes CECT

hello 
secret codes below I used to a CECT N95 phone and runs. Not guarantee it works on all phones produced in China, and even if it cause damage to your phone:

CECT Handy Codes

Sprachen:

*#0000# (Language set to default)
*#0044# (Language set to English)
*#0886# (Language set to traditional Chinese)
*#0034# (Language set to Spanish)
*#0048# (Language set to Polish)
*#0033# (Language set to French)
*#0049# (Language set to German)
*#0039# (Language set to Italian)
*#0066# (Language set to Thai)
*#0007# (Language set to Russian)
*#0351# (Language set to Portugese)
*#0084# (Language set to Viatmnese)
*#0385# (Language set to Croatien)
*#0972# (Language set to ??? error)
*#0966# (Language set to Arabic)
*#0091# (Language set to ??? error)
*#0086# (Language set to simplified chinese)

Misc:

*#06# (show IMEI)
*#8375# (Version info Summary)
*#3646633# (Engineer Mode)
*#66*# (Factory mode)
*#87# (Auto test)
*#33778# (Serial number)
*#523# (Main lcd-contrast)
*#1234# (swap a2dp int/ a2dp acp mode)
*#12345# (says "a2dp acp not connected")
*#6688# (komischer neustart)
*#035670766*001# (ctrl buffet = 0)
*#035670766*002# (tsk sbg mask = 197632)

System info:

##62# (infos)
*#21**11# (infos)
*#43# (infos)