Outgoing calls cannot be made:
Check the phone number and try again.
Have you activated call barring? If so, please disable
all call barring.
Check whether the SIM card is registered on the
network.
Check whether enough credit is on your SIM card.
You do not receive incoming calls:
Check whether the SIM card is registered on the
network.
Check whether the phone is turned on.
Check the signal strength
Have you activated call barring? If so, please disable
all call barring.
Display is black:
Check the battery status, charge the battery for 24hrs
or, if necessary, replace it (6 months warranty). Check
the background image.
Blocked PIN:
Check whether the PIN code was entered correctly. If
the PIN code has been entered incorrectly 3x, the SIM
card is locked and you will need the PUK code:
(Please contact your network operator for your PUK
code).
I do not hear the other caller
Check the volume settings.
Try restoring the factory settings.