One of the great features on the newer phones is that they can be setup as a mobile internet access hotspot. While it’s a bit different on each phone and operating system, the basics are the same.
On Android Lollipop, under Wireless and Networks, you click on More.
You will then find the Tethering & portable hotspot. Turn it on – name it and setup a password. Now you can connect your laptop/tablet to the internet.