Each handset has an electronic market makers were you?

Set inside, unknown sources: Allow installation of non-Market applications, without the check, why can also install the downloaded apk? I installed the software, you are operating from a web page, instead of downloading from the electronics market.
Each vendor's electronic market difference? ZTE, Huawei, Samsung, htc, etc., seem to have an Android phone market, does not look like the same. There are some third-party software also has the Android Market, qq, 360 and the like.
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Please understand that friends offer advice, thank you
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Electronics market this kind of thing is a piece of software, a publishing platform application, any eligible applications can publish up to the platform, such as 91 assistants, ING markets, pea pods, etc., no one can be introduced, therefore, If manufacturers do their own electronic market, then he will have ah! Did not do it does not.
As the landlord said Andrews market, then Google launched is android comes, so there are a lot of mobile phones, after the call google market 4.0.
Said the landlord understand?
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Understand, thank you very much. Many applications are actually uploaded to a lot of hand-electronics market go up, the domestic electronics market, there are many. Uploaded to the electronics market, the audit intensity is very small, it is not some Trojan can release up yet?
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Manufacturer's own thing. You can put some of their own applications.