Create a Wi-Fi hotspot with an Android phone. On your phone go to Settings > More > Wireless & networks > Tethering & portable hotspot. The Network SSID will default to AndroidAP but you can change that and a password to something that is secure but also easy to remember.
Can I use my phone as a wifi hotspot?
At the Settings screen, tap the Wireless & networks option. Click the check mark beside the option for Portable Wi-Fi hotspot to turn on the hotspot, and your phone will start acting like a wireless access point.