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do I need to enable debugger and paintflash. I don't know what this does I'm not very smart with these phones. and what kind of add onsite do I need

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I have t mobile Samsung avant phone

I have t mobile Samsung avant phone

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No, you do not need these unless you are planning on capturing logs for an issue or performance for a ui of a site. These tools are mainly for development use. If you are curious about them: