小(xiao)米12S的(de)(de)(de)正面屏幕依(yi)舊采用了居中挖孔屏，兩側邊(bian)框(kuang)依(yi)舊保持(chi)弧(hu)形設計(ji)，線(xian)條極為(wei)有序，四邊(bian)框(kuang)超窄。這一(yi)系列的(de)(de)(de)設計(ji)，加上已經很(hen)小(xiao)巧的(de)(de)(de)6.28英寸OLED陽光(guang)屏+182克重+8.16mm的(de)(de)(de)機身厚度，持(chi)握(wo)感(gan)很(hen)順滑，再者金(jin)屬中框(kuang)和玻璃后蓋，配合曲面屏的(de)(de)(de)設計(ji)，整體手感(gan)非(fei)常好(hao)。

小(xiao)(xiao)米(mi)(mi)12S配備4500mAh的(de)大電(dian)(dian)(dian)池(chi)，這(zhe)次(ci)的(de)電(dian)(dian)(dian)池(chi)容量(liang)和充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)功(gong)率(lv)與(yu)小(xiao)(xiao)米(mi)(mi)12相同(tong)。不過得(de)益(yi)于(yu)驍(xiao)龍(long)8+的(de)功(gong)耗(hao)表現，小(xiao)(xiao)米(mi)(mi)12S的(de)續航(hang)提升到了(le)一(yi)定程(cheng)度，并且充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)速(su)度有(you)所提高。有(you)67W有(you)線(xian)(xian)(xian)充(chong)(chong)(chong)(chong)/50W無線(xian)(xian)(xian)充(chong)(chong)(chong)(chong)/10W無線(xian)(xian)(xian)反充(chong)(chong)(chong)(chong)三種充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)模(mo)式，有(you)線(xian)(xian)(xian)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)42分鐘就能充(chong)(chong)(chong)(chong)滿，無線(xian)(xian)(xian)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)一(yi)小(xiao)(xiao)時可充(chong)(chong)(chong)(chong)滿，無線(xian)(xian)(xian)反充(chong)(chong)(chong)(chong)能在緊急時刻(ke)秒變移(yi)動(dong)電(dian)(dian)(dian)源，實用便(bian)捷。

小米12S搭載臺積電(dian)4nm工(gong)藝制造的(de)驍龍(long)8+旗艦處理器(qi)，擁有動態調節(jie)功能(neng)(neng)，性(xing)能(neng)(neng)提(ti)升10%，功耗(hao)降(jiang)低(di)30%，跑分可(ke)達110W左右。因(yin)為(wei)功耗(hao)的(de)降(jiang)低(di)，手機(ji)的(de)散熱(re)性(xing)和續航能(neng)(neng)力相比之(zhi)前也有很大的(de)提(ti)升，這對于(yu)手游(you)重度使用(yong)者來說(shuo)，也絕(jue)對是一件好事。

影像方面是小米12S的升級點，不僅有徠卡加持，還有，主攝像頭也升級為1/1.28英寸的索尼IMX707大底主攝，細節呈現更細膩，光感處理更好。其(qi)他兩個副攝(she)(she)和小(xiao)米12一樣，為5MP長焦微距+13MP超廣角(jiao)。小(xiao)米和徠卡聯合開發原生雙(shuang)畫質，在拍攝(she)(she)畫質的選(xuan)擇上，可以選(xuan)擇默(mo)認是(shi) “徠卡經典”還是(shi)“徠卡生動”。此(ci)外，小(xiao)米12S在相機開啟(qi)速度和拍攝(she)(she)速度方面也很不錯，不管是(shi)白天還是(shi)弱光下都啟(qi)動快(kuai)、拍攝(she)(she)快(kuai)，成片(pian)率也很高。