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If you are having trouble connecting LMSA to your LM Studio server, follow the steps below.
Verify that Serve on Local Network is enabled in LM Studio settings. This is required for the server to accept connections from devices on your network.
The IP address shown in LM Studio may sometimes be incorrect. Manually check your computer’s Wi-Fi adapter IP address:
  • Windows: Open Command Prompt and type ipconfig, look for “Wireless LAN adapter Wi-Fi” and use the IPv4 Address listed there.
  • Mac: Go to System Preferences > Network, select Wi-Fi, and note the IP address.
  • Linux: Open Terminal and type ip addr show or ifconfig.
Enter this IP address from your Wi-Fi adapter into LMSA.
  • Ensure both your computer and Android phone are on the same network.
  • Avoid guest networks, which often isolate devices from each other.
  • Check if your router has VLAN isolation or AP isolation enabled (disable if present).
  • Disable VPN on both devices, as VPNs typically isolate local network connections.
Windows Users: Check Windows Firewall to ensure LM Studio is allowed through:
  • Go to Windows Security > Firewall and network protection > Allow an app through firewall.
  • Verify LM Studio has checkmarks for both Private and Public networks (or whichever profile you are using).
  • If LM Studio is not listed, click “Allow another app” and add it manually.
Linux Users:
  • Check UFW in terminal with sudo ufw status.
  • Ensure the correct port is allowed.
  • Try using different ports if the default (1234) does not work.
  • Common alternatives: 8080, 5000, 3000.
  • Ensure the port you choose is not blocked by your firewall or used by another application.
If all models or only a partial list of models are showing as options in the Model Information modal:
  • Close LM Studio and the LMSA Android app completely.
  • Start LM Studio again.
  • Open the LMSA app.
  • If this does not work, restart your computer and Android device and try again.
From Android to Computer:
  • Download a networking app with ping functionality (for example, PingTools or Network Utilities).
  • Ping your computer’s IP address to verify connectivity.
From Computer to Android:
  • Find your Android phone’s IP address in your router’s connected devices list or in phone settings.
  • Open Command Prompt (Windows) or Terminal (Mac/Linux) and run tracert [phone-ip] (Windows) or traceroute [phone-ip] (Mac/Linux).
  • If the traceroute fails, there may be network isolation preventing communication.
Some Android devices aggressively close background connections to save power. You may need to disable battery optimization for LMSA to prevent connection drops.
1

Open device Settings

Open your device Settings.
2

Find Apps

Tap Apps (or Apps and Notifications).
3

Select LMSA

Find and tap LMSA in your app list.
4

Open Battery settings

Tap Battery (or App Battery Usage).
5

Set to unrestricted

Select Unrestricted (or toggle Allow background usage).

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OpenRouter troubleshooting

If you are using OpenRouter and experiencing issues, see OpenRouter setup and troubleshooting for common problems such as API key errors, model loading failures, and switching back to local mode.