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loss all my contacted !

Depends on where they were stored you can get them back, contact your cell phone company for help. If they were on the local phone memory and you did not have any backups, they are lost if they were deleted.
 

+1. This is the best possible answer to the original question.
 


Can we have more information please. What type of phone did you have? Was it android? Was it Apple? If it was Apple did you have iCloud syncing your contacts? If you had Android did you have your Gmail account tied to it and did you have contact syncing on?