WiFi is just a frequency band used by portable devices located within approx. 200ft of each other to communicate.
It has no content except for what the devices have available.
If you want internet access then you need a device that can access the internet and also has WiFi ability.
Mobile internet access is usually gained by 3G/4G cell phone service.
This of course requires a monthly subscription.
Many cell service providers offer sharing plans that allow you to add devices to your cell package and share the data plan.
There are many portable 3G/4G Routers with WiFi.
These can be adapted to 12v
They come with USB port for a cell providers USB 3G/4G "stick" or with a SIM card slot.
And depending on your phone some routers can be hooked up to your phone and share your 3G/4G plan that way.
Some phones also have the ability to become a WiFi "AP"(access point), this would be in it's settings menus, you would setup the phone as a "wifi router" with a SSID and password, just like any wifi router.
A "router" is needed so more than one device can connect via WiFi, the router allows devices to "talk" to each other and also to internet sites as available.
Last edited by RonD; 03-26-2015 at 10:13 AM.