first try a factory reset
service mode
Press Press [MENU]; then, press [#] to start service mode.
Data Initialization Mode (CLEAR)
# CLEAR
Registration/settings of user data and service data are initialized with CLEAR ALL, and go back to factory defaults.
# Clear All
Since the TYPE setting of #CLEAR item goes back to STANDARD when #CLEAR ALL is executed, there is a need to change the TYPE setting to
conform to the communications standards of a specific country/region.
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