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Every time I power down the unit and start again can be seen in Whatsapp only numbers . If I then attempts to synchronize the account are all away Contact Power also from my phone book . If the unit then restart mostly it goes again, but sometimes I have the Whatsapp then complete deletion . I used instructions of Whatsapp help and could not fix the problem !
Where is the problem ?

Hi,

Have you ever try a recovery to factory setting to solve your problem ?

Best regards,
Admin