LG LG400G - Manual (Page 34)

Prepaid
31
SIM Number
Menu 1.7
SIM Number displays the SIM Card's
Serial Number.
Code Entry Mode
Menu 1.8
Code Entry Mode will allow the phone
to accept Service Provider - Related
codes in order to add airtime, modify
specific data, and troubleshoot any
issues with the phone. While using
Code Entry Mode, you cannot receive
incoming calls or use event alerts.
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