How a Landing page redirect me when I use my phone

[Jacke met]

Hi i found a landing page redirect me to an offer when I am using my phone but with my laptop shows 404 error how to view the code detection my phone I tried but couldn't find it

 

[uncutu]

there's a couple big scripts floating around
basically you upload a little script to your server that checks for known mobile useragent footprint, or browser width.
see https://www.woorank.com/en/blog/how-to-redirect-mobile-users-on-your-website

 

[Jacke met]

there's a couple big scripts floating around
basically you upload a little script to your server that checks for known mobile useragent footprint, or browser width.
see https://www.woorank.com/en/blog/how-to-redirect-mobile-users-on-your-website

Thanks