Basic iPhone Information
Use these shortcuts to view information about your iPhone’s core functionality:
*3001#12345#* : Enter Field mode. Field mode reveals many of the inner settings of your
iPhone, specifically up-to-date network and cell information.
*#06# : Displays your iPhone IMEI, the unique identifier for your cell phone hardware.
(No need to tap Call.) Together with your SIM information, it identifies you to the provider
network.
*#21# and tap Call: Call feature settings (enabled/disabled) for voice, data, fax, SMS, sync, async, packet access, call forwarding.
*#30# and tap Call: Caller-ID display check (enabled/disabled)
*#76# and tap Call: Connected call display check (enabled/disabled)
*#43# and tap Call: Determine if call waiting is enabled.
*#61# and tap Call: Call forwarding number with service (no-answer)
*#62# and tap Call: Call forwarding number without service (no-ring)
*#67# and tap Call: Call forwarding number when busy
*#33# and tap Call: Check outgoing services for call-barring (enabled/disabled)
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