You probably didn’t know about some of these codes before now but they could be really cool if you tried some of them. The ones you see below are for iPhone. The list was put together by BGR
*#06# – Displays IMEI
*3001#12345#* + “Call” – Accesses a hidden Field Test menu
*#43# + “Call” – Displays call waiting status
*43# + “Call” – Enables call waiting
#43# + “Call” – Disables call waiting
*#21# – Displays call forwarding status
##002# + “Call” – Disables all call forwarding
*33*pin# – Enables call barring
#33*pin# – Disables call barring
#31#phone-number + “Call” – Blocks caller ID for the current phone call
*3370# + “Call” – Enables “Enhanced Full Rate” and improves voice quality on GSM networks (may impact battery life)
*#5005*7672# + “Call” – Displays your carrier’s message center phone number
Here are two notable ones — the first will work on most Android phones and the second will work on all Android phones:
*#*#4636#*#* – Accesses a hidden test menu with sections for network, battery information and usage stats.
Under the “About phone” option in Settings, tap “Build number” seven times – this will enable a new “Developer options” menu in Settings that gives you access to a treasure trove of functions.
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