What does the "signed version" of mobile phone software mean? What's the difference between it and "untrustworthy"? My mobile phone is Samsung M8800 software. Can I use a signed version?

The signed version of mobile phone software is the third-party mobile phone software officially recognized by mobile phones. There are not so many restrictions in the use process, and the function is also perfect. Users are relatively safe during use. Untrusted means that there is no officially recognized third-party mobile phone software, you can't use the read-write permission of the mobile phone, and you can't write data in the mobile phone or card through the program. There are many restrictions. This mobile phone can be used.

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