JETHRO SC118 User Manual page 42

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Poor call quality
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Jethro SC118 User Manual
charges.
Check whether the SIM
card is valid.
Check whether the call
restriction
enabled.
Check whether the fixed
dialup
enabled.
Check whether the call
volume
appropriately.
If you use the mobile
phone in places with
poor signals, such as
around high buildings or
in the basement, radio
electric waves
reach you effectively.
If you use the mobile
phone during the peak
hours, such as the traffic
42
function
function
is adjusted
cannot
is
is