MTS Systems Buzz X121 User Manual page 39

Poor quality of
calling
Standby
duration
shortened
SIM Card Error
Fail to dial out
Input PIN. Inputting PIN while turning on each time is
activated, you have to input the PIN code.
Input PUK code: Having input wrong PIN code for 3
times straight will lock the SIM card. You need to input
the PUK code provided by your network provider.
Please check if the sound volume is tuned improperly.
In an area with poor receiving condition for example:
basement, the signal might be weak. Try reaching a
location with stronger signal reception and call again.
While using the mobile phone in the peak period of
communication like commute time, you may be unable
to call because of line congestion.
The standby duration is relative to the system setting of
network. While the mobile phone is in an area with poor
signal strength and can not receive the signal, the
handset will continuously search for a base station. This
will significantly reduce battery charge. It is
recommended that you turn off your mobile in area
with no signal reception to save battery. Need replacing
the battery. Please change a new battery.
Dirt on the metal surface of an SIM card. Use clean cloth
to wipe the metal touch point on an SIM card.
The SIM card is not installed.
The SIM card is damaged. Please contact your network
service provider.
Please confirm if you press the dial key after dialing.
Please confirm if calling is forbidden because of
defaulting.
Please confirm if the SIM is valid.
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