A server device may communicate with a user device by engaging in a telephone call with the user device, by providing a webpage to the user device, or in another way. The user device may communicate a request to the server device for a particular web service, such as a mapping service, a banking service, technical support, customer service, etc., and the server device may communicate the request to an instant access device that may cause the user device to instantly access the web service, whether by automatically downloading and installing a mobile application with the web service or by automatically accessing a web page. In some implementations, the instant access device may authenticate the user device in order to provide the user device with access to the web server.