Option A — Virtual device
- Android Studio → Device Manager → Create Virtual Device.
- Pick a recent Pixel profile.
- Download the latest stable system image and finish.
- Press ▶ to boot it.
Option B — Your own phone
- Install Expo Go from the Play Store / App Store.
- Make sure your phone and laptop are on the same Wi-Fi network.
Tip
Campus Wi-Fi often blocks device-to-device traffic. If the phone can’t connect, use npx expo start --tunnel.
Verification
Run each command in a new terminal window.
adb devices→ expect At least one device listed as "device"
Common errors
Physical phone shows as "unauthorized"
Fix
Unlock the phone and accept the "Allow USB debugging?" prompt.