Common Problems & Troubleshooting - YAKOYA S1 User Manual

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7. COMMON PROBLEMS & TROUBLESHOOTING
Before contacting the after-sales service provider, conduct the following
simple checks and this may save your unnecessary time and expense on
repair.
Common
Problems
Unable to start
the mobile
phone
Unable to
connect
network
Display
messages at
start
Cause & Troubleshooting
- Check whether you hold the start key for at least 3
seconds.
- Check whether the battery is in poor state. Please
remove the battery, install it again, and try to restart it.
- Check whether the battery has run out of power, and if
yes, please charge the battery.
- Weak signals. Please retry in a place with strong signals.
- Beyond the network coverage of your network operator.
- Invalid SIM card. Please contact your network operator.
- Check whether the SIM card has been correctly inserted.
- Locked. You have selected the automatic locking
function, and entering the mobile phone password before
using it.
- Enter PIN. You have selected the option of entering PIN
for each start of the mobile phone, and so you must enter
the PIN code (When the mobile phone is first used, the
PIN code on the SIM card must be entered).
- Enter the PUK code. Wrong inputting of the PIN code
will lock up your mobile phone, and you should use the
PUK code provided by the network operator to launch it
again.
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