Ok thanks for the answer. What's the delay for the answer of the after sales support ?

Because I send mail there is more than two days and I had no answer....

Regards

Hello I just receive my bv9800 today and it looks great. But i have one issue. When i call somebody the screen immediatly Switch off and become black. Same when i receive a call...The only way to return to the screen IS to stop the call with the power button.... There is no problem when the 3.5mm is...