借了支5S有升級IOS8及4G的來測試 在同樣的地點進行測試 升級IOS8那支手機有SHOW 4G的訊號 SPEEDTEST測速25M UP 而更新IPCC檔這支確定有開啟4G,但手機只SHOW 3G SPEEDTEST測速5~10M
似乎沒功用....
這手刷更新檔的方式究竟有沒有人試成功...
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