[問題] 請問可以由ios8退回ios7.1.2嗎?
我的手機是iphone4s
昨天晚上升為ios8後諸多不順
上網查才發現iphone4s不太適合ios8
請問我還能退回ios7.1.2嗎?
有什麼該注意之處呢?
希望大家能熱心分享,謝謝
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