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https://faq.whatsapp.com/425247423114725/?locale=en_US&cms_platform=iphone#:~:text=WhatsApp%20Business-,How%20to%20link%20to%20WhatsApp%20from%20a%20different%20app,-Copy%20link
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<!--just telephone number-->
https://wa.me/1XXXXXXXXXX
<!--Telephone with message-->
https://wa.me/1XXXXXXXXXX?text=I'm%20interested%20in%20your%20car%20for%20sale
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# Direct URL
https://web.whatsapp.com/send?phone=5541988897799&text&app_absent=0