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Solution :
LAUNCH X431 PRO3S+ APP download is incorrect, does not match the serial number of the machine,
you need to go to the download center of LAUNCH official website to find the corresponding X431
PRO3S+ download.
Here is the link of downloading LAUNCH X431 PRO3S+ APP Android Download:
https://eninfo.x431.com/sv.aspx?TypeId=36&fid=t8:36:8
Note:
If the APP is downloaded correctly, it still prompts that the password is incorrect when registering.
Need to provide your product serial number, please contact us to solve it for you.
http://www.x431.com/
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