vivo X9s在外观设计方面，虽说与X9的变化并不大，但颜值与设计感都是非常高的。其正面采用了5.5英寸的屏幕，极窄边框设计形式，屏占比高达78.5%；Home键采用了不可按键的固态Home键，侧边采用了折面处理，加上只有1.59mm厚度的机身，使得vivo X9s显得十分的轻巧。机身整体采用了铝合金一体式设计以及U型天线设计。
硬件配置方面，X9s选用骁龙652八核处理器，拥有4GB+64GB运存，搭载基于Android 7.1的Funtouch OS 3.0操作系统。不得不说，X9s的Funtouch OS 3.0是整款产品一大亮点。Funtouch OS的设计相当讨喜，圆润的图标，功能齐全的菜单，与iPhone类似的操作习惯。据官方介绍，vivo在应用分身，分屏多任务，儿童模式等贴心功能都进行了升级。
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