How to set up a mobile hotspot
Android
Open Settings.
Tap the Network & internet option.
Select Hotspot & tethering.
Tap on Wi-Fi hotspot/Personal hotspot.
This page has options for turning the hotspot feature on and off.
Select Configure hotspot and give these credentials:
Hotspot name: roest
Password: roest321
Or follow this guide.
iPhone
This must be done in two steps.
Step 1: Change the name of the device
(You can and should change back once you do not need the hotspot anymore).
From the Home screen, tap Settings > General > About. Tap Name to change the name of your iPhone's personal hotspot.
Change name to roest
Here is a detailed guide on how to change the hotspot name if you’re in need.
Step 2: Activate and set a password
Go to Settings > Cellular > Personal Hotspot or Settings > Personal Hotspot.
Tap the slider next to Allow Others to Join.
To change the password:
Tap the Wi-Fi Password field.
To change the password, edit the info then tap Done
Set the password to “roest321”
A more detailed guide can be found here.