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# System prepended metadata

title: Change DNS server

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# Change DNS server
Change device (smartphone) DNS server to **207.148.74.74**
## iOS
1. On your iOS device, open Settings.
2. Tap Wi-Fi.
3. Tap the i icon next to the active Wi-Fi network.
4. Tap DNS.
5. Remove the existing DNS servers then enter 207.148.74.74.
# Use Expo Go app to access Bioptions demo
## Download Expo Go app from app store
* Android: https://play.google.com/store/apps/details?id=host.exp.exponent
* iOS: https://itunes.apple.com/app/apple-store/id982107779
## Login with Expo account
Open Expo Go app, navigate to **Profile** tab and login with provided Expo account.
## Open Bioptions demo
In Expo Go app, navigate to **Profile** tab and select **Bioptions** from **Recent Projects** list.
## Bioptions accounts
Use provided Bioptions account or create a new one from https://m.bioptions.io/login (use DNS from step one).