You do not receive incoming calls:
408
Check whether the SIM card is registered on the
409
network.
410
Check whether the phone is turned on.
411
Check the signal strength
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Have you activated call barring? If so, please disable
413
all call barring.
414
Display is black:
415
Check the battery status, charge the battery, or
416
replace it.
417
Check the background image.
418
Did the phone get wet?
419
Blocked PIN:
420
Check whether the PIN code was entered correctly.
421
If the PIN code has been entered incorrectly 3x, the
422
SIM card is locked and you will need the PUK code:
423
(Please contact your network operator for your
424
PUK code).
425
I do not hear the other caller
426
Check the volume settings.
427
Try restoring the factory settings.
428
Remove the battery briefly.
429
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