Secret codes for All Android phones

Check Your Phones Hidden Details And Test Your Phone By Entering These Codes on Dialer:
Phone information: *#*#4636#*#*
LCD Test: *#0*#
Change end call option: *#*#7594#*#*
Service mode: *#*#197328640#*#*
Backup media files: *#*#273283*255*663282*#*#*
WLAN test: *#*#526#*#*
Wifi MAC Address: *#*#232338#*#*
GPS Test: *#*#1472365#*#*
Another GPS test: *#*#1575#*#*
Bluetooth test: *#*#232331#*#*
Bluetooth device address: *#*#232337#*#
GTalk service monitor: *#*#8255#*#*
Packet loopback: *#*#0283#*#*
Another LCD test: *#*#0*#*#*
Melody test: *#*#0673#*#*
Device test: *#*#0842#*#*
Touch version: *#*#2663#*#*
Touch screen test: *#*#2664#*#*
Proximity senser test: *#*#0588#*#*
RAM version: *#*#3264#*#*
Hard reset: *2767*3855#
Soft reset: *#*#7780#*#*
PDA, Phone,
H/W, RF call date: *#*#4986*2650468#*#*
PDA, Phone & CSC: *#*#1234#*#*
FTA S/W version: *#*#1111#*#*
FTA H/W version: *#*#2222#*#*
PDA, Phone, CSC, buiid time, changelist number: *#*#44336#*#*