You can have your Linux server on your phone for mobile web development. If you don't have a laptop no problem, your phone can be your local web server environment with Apache2, PHP MySQL, NodeJS, Ionic framework and more.
There is another trending scam now where you are told to watch video ads and get paid. But will you get paid? As there is a little bit lack of innovation, scammers are going back to old tricks and hoping to get new victims. An example.