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Those characters appear when something is invalid on the page. Specifically, they are used by UTF-8 to represent invalid characters, and can be summed up as an invalid attempt to read non-UTF-8 data as UTF-8, followed by the opposite. Normally, this is caused by one of two things: The site you are connecting to has encoding issues on the server side. This ...


Google messenger ? (Hangout) is that what you mean ? it's require an internet connection and that's it . yes it's require a signal tower if you want to run it on your phone using 3G,2G,4G data connection .

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