Firstly, the product does not work for my smartphone when I received it, which is very disappointing. I actually used the wrong way but I don't know so I wanted to contact the seller to ask for help. Then I found that I received an email from the seller of the USB stick, he told me how to use it and the details. This worked for my Galaxy J3 after referring to the user guide. He provided professional service and solved my problem! The painter did a good job too. I can recommend, especially the customer service!
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