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3. The phone function cannot be used, and the K662C does not have a telephone interface.

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5. Thunderbolt download seems to be restricted,Basically no download speed,Look on the Internet and say set DNS,It's useless to set it,It may be that the mobile itself is limited.,It's a long time ago.,I'm not sure it's the reason for changing cats.,Look at the web page,Brush Tik Tok,Speed measurement is normal。

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