How to Use Device Network (VPN)

Device Network sends an Android phone’s traffic to the computer over USB, then out through the computer network or a saved proxy or VPN route. Each phone can use its own route with live traffic statistics.

Full video: add a route, test its exit, assign a device, and verify the public IP

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Before you start

A LaiCai Screen Mirroring Premium membership
An Android phone connected over USB
A Device Network-capable LaiCai Android Agent installed on the phone

Where phone traffic goes

The phone stops using its original Wi-Fi or mobile data. Requests and responses travel through the same USB path and the selected computer-side route.

Android phone

USB

Computer

Selected route

Internet

Available route modes

Open Devices → Device Network, switch to Routes, and click Add route.

Computer network

Use the computer’s current connection; start here to verify Device Network.

SOCKS5

Enter the proxy host, port, and optional username and password.

HTTP

Use an HTTP proxy. TCP and DNS are supported; other UDP traffic is unavailable.

HTTPS

Use an encrypted HTTPS proxy. TCP and DNS are supported; other UDP traffic is unavailable.

WireGuard

Import a WireGuard .conf profile.

OpenVPN

Import an .ovpn profile and add credentials only when required.

Add and connect a route

Add a route

Under Routes, click Add route, name it, and choose a mode. Computer network needs no extra configuration; OpenVPN and WireGuard require a matching profile.

Test the route

Save and click Test. A successful result shows the exit IP, elapsed time, and timestamp. The test does not start the phone VPN or change the computer’s system route.

Assign it to a device

Open Device connections, select an online phone, and choose the saved route. LaiCai remembers the assignment, but it does not reconnect automatically after the app restarts.

Connect and verify

Click Connect and accept the Android VPN request the first time. Check the phone’s public IP; it should match the route test, while the device row shows inbound and outbound traffic.

Disconnect and restore networking

The VPN key in the Android status bar means Device Network is handling phone traffic.
“USB tunnel active” confirms only the USB channel, not public internet reachability.
If USB or the route drops while the phone VPN remains active, traffic stays blocked instead of falling back to the phone’s original network.
When finished, click Disconnect or choose Stop and restore phone network in Agent.

Connect an Android phone Install and use LaiCai Android Agent Purchase or upgrade Premium