[問題] lumia 820 更新Black後有4G?
Hi各位大大
我的Lumia820終於更新完Black了
發現行動數據裡的最高連線速度可以選4G
這是以前就有的嗎?還是說4G的封印已經解開了
另外以前也有駕駛模式嗎
謝謝大家的解惑
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