How to change DNS settings on Android
Go to Settings and select Network & internet

Select Wi-Fi

Click on the setting icon

Click on Advanced

Remember your IP address, Gateway and Subnet mask, then click on the setting icon

Find IP settings and change to Static

Enter your IP address, Gateway, Network prefix length and DNS.SB's servers
185.222.222.22245.11.45.11
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If this guide doesn't work, ask your geek friend for help.