| 每次有一條訊息時都會連響兩次-u can go setting-> notification-->messages--> repeat alert ->choose "never" or "once" 聲音重疊在一起. 就連facebook, whatsapp, 甚至一般message
 -->for "whatapps'" u can go whatapps--> notifications change the sound
 --> for "message " u can go setting  --> sound--> text tone to change the sound
 
 
 hope this can help u
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