The mic. should be close to mouth.
Check if the built-in mic. is not covered.
When a headset is un use, check if it has been
connected correctly.
Check if the built in speaker isn’t covered.
Check if the typed-in phone number is correct.
Check if the phone number entered to the
[Phonebook] is correct.
Enter the correct phone number if necessary.
Proper use of the battery
Battery in this device can be powered by a charger. If the level of energy
in the battery is low, recharge it. To extend the battery life, let it discharge
below 20% of its full energy level before connecting to the charger and
charge it up to 100%. If not used, unplug the charger from the phone.
Excessive charging causes shortened battery life. The battery temperature
affects the quality of charging.
Before the charging process starts, lower or raise the temperature to be
close to room temperature (approx. 20°C). If the battery temperature
exceeds 40°C the battery must not be charged!
If the battery overheats, the device will display an appropriate message.
The battery lifespan can be shortened, if it has been exposed to very low
or very high temperatures - this causes interference to the phone, even
when the battery has been properly charged. Use the battery only
according to its intended purpose. Avoid leaving the battery within
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