可以通过如下步骤进行：
1、打开微信以后，点击左下角的最后一个选项，也就是显示自己微信号的那一页。如图所示：
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https://iknow-pic.cdn.bcebos.com/cefc1e178a82b901892cc2807f8da9773812ef84"/>
2、这一页有钱包、收藏、相册、表情设置，点击设置的选项，打开该选项。如图所示：
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https://iknow-pic.cdn.bcebos.com/4afbfbedab64034fcd27c3b5a3c379310b551d9e"/>
3、打开以后会出现新消息提醒、勿扰模式、聊天、隐私、通用等选项，打开通用这个选项。如图所示：
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https://iknow-pic.cdn.bcebos.com/6159252dd42a2834274137b857b5c9ea14cebf99"/>
4、点开以后出现的页面上有多语言、字体大小、功能等选项，打开功能选项。如图所示：
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https://iknow-pic.cdn.bcebos.com/622762d0f703918f4e303c795d3d269758eec4a4"/>
5、点开功能选项以后就会看到已经开启的功能和没有开启的功能，在其中找到通讯录同步助手。如图所示：
/iknow-pic.cdn.bcebos.com/29381f30e924b8997209798b62061d950a7bf648"target="_blank"title="点击查看大图"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.com/29381f30e924b8997209798b62061d950a7bf648?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto"esrc="
https://iknow-pic.cdn.bcebos.com/29381f30e924b8997209798b62061d950a7bf648"/>
6、点开助手以后如果是已经启用的就将定时提醒备份打开，没有启用的话就点启用。如果想恢复自己的通讯录就点击使用同步助手。如图所示：
/iknow-pic.cdn.bcebos.com/d31b0ef41bd5ad6e488064598dcb39dbb6fd3c03"target="_blank"title="点击查看大图"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.com/d31b0ef41bd5ad6e488064598dcb39dbb6fd3c03?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto"esrc="
https://iknow-pic.cdn.bcebos.com/d31b0ef41bd5ad6e488064598dcb39dbb6fd3c03"/>