To use Bixby in One UI 8.5, you need to do three things: open the Bixby app’s settings, turn on Voice wake-up, and decide how you want to launch it — with your voice, with the Side key, or both. Everything else, such as language, lock-screen behavior, and text input, is configured from the same settings screen. Here’s how to get there and which settings matter most.
What You Need Before You Start
Bixby is not a standalone system available to every Samsung user without conditions. Before you set it up, make sure your device meets these basic requirements:
- A Samsung phone or tablet running One UI 8.5.
- A Samsung account if you want Bixby to personalize results, access your calendar, or control supported third-party apps. Basic device commands such as turning on Wi-Fi work without one, but many assistant features require a signed-in account.
- A working microphone and an internet connection during the initial setup so the language pack can be downloaded.
- The Bixby app on your device. If you cannot find it, search for Bixby in the Galaxy Store and install it from there.
Bixby’s availability and supported languages vary by region. If the app or its settings are completely absent, Bixby may not be enabled for your country or device language.
Where to Find Bixby Settings
In One UI 8.5, most Bixby settings are not scattered across the main Settings app. They live inside the Bixby app itself. There are three practical ways to reach them:
- Open the Bixby app. On its home screen, tap the menu icon in the top-left corner, then tap Settings. This opens the main Bixby settings page with voice wake-up, language, feedback, and lock-screen options.
- Search the Settings app. Open Settings, tap the search bar at the top, and type “Bixby.” The results will include the Bixby app-info page, Bixby Service, and Bixby wake-up settings. This is especially useful when you cannot find the app icon.
- Use the Side key. If your phone’s Side key is set to open Bixby, press and hold it. In Bixby, open the menu and tap Settings. If the Side key does nothing, you will need to change its assignment first.
You can also speak to Bixby and say “Open Bixby settings.” Once Bixby recognizes the command, it will jump straight to the settings screen.
Setting Up Bixby for the First Time
When you open Bixby for the first time, a setup wizard walks you through the essentials. Expect to be asked to:
- Accept Samsung’s terms and privacy policy.
- Sign in to your Samsung account, or skip this step temporarily.
- Allow microphone permission. If you deny it, Bixby can still be used by typing, but voice commands and the “Hi Bixby” wake phrase will not work.
- Teach Bixby your voice. You will be asked to repeat short phrases so Bixby can build a voice model for wake-up detection.
- Choose whether Bixby may respond while the phone is locked.
If you skip the voice enrollment during the first run, you can complete it later from Bixby Settings. After setup, you can start Bixby by saying “Hi Bixby” or by pressing and holding the Side key.
The Bixby Settings That Matter
The labels inside Bixby Settings may shift slightly between software updates, but the important controls are consistent. Here is what each one does.
Voice Wake-up
The Voice wake-up toggle controls whether Bixby listens for the phrase “Hi Bixby.” When this is on, Bixby can respond even when the screen is off, as long as the lock-screen setting also permits it. If Bixby stops recognizing your voice, use the retraining option, often labeled “Get to know your voice again” or “Reset voice wake-up.” This records fresh samples of your speech and can fix recognition problems quickly.
Lock Screen and Feedback
Inside Bixby Settings, look for an option such as Respond while the phone is locked. This determines whether Bixby can answer questions and carry out commands before you unlock the phone. For sensitive actions like sending messages, Bixby will normally ask for biometrics or your PIN regardless of this setting.
Language and Text Input
You can change the language Bixby uses from its settings, though the available languages depend on your region. Some versions also let you choose the assistant’s voice style. More importantly, there is a Text input option. When enabled, a keyboard icon appears in Bixby, letting you type commands instead of speaking them. This is useful in quiet environments or when Bixby keeps mishearing a particular word.
App Permissions
Go to Settings > Apps > Bixby to see the app’s microphone permission, battery usage, and storage. The mic permission is the most common cause of Bixby voice problems. If Bixby cannot hear you, check this page first. You can also clear Bixby’s data from the same screen, but that removes your voice model and forces you to repeat the initial setup.
Assigning Bixby to the Side Key
The Side key on recent Samsung devices is customizable. To open Bixby with a physical button instead of the wake phrase:
- Open Settings.
- Tap Advanced Features, then Side key.
- Under Press and hold, choose Wake Bixby or select Bixby if it appears as an option.
- If your device supports a double-press shortcut, you can set that to Bixby as well, although some models allow only one custom shortcut.
After this change, pressing and holding the Side key opens Bixby from any screen. This is a reliable backup when voice wake-up is disabled or when the phone is sitting on a table out of reach.
Using Bixby to Control Phone Settings
A large part of using Bixby in One UI 8.5 is asking it to change system settings. The commands that work most reliably are the ones that match recognizable setting names:
- “Turn on Wi-Fi” or “Turn off Bluetooth.”
- “Open display settings.”
- “Turn on Power Saving.”
- “Set brightness to 50 percent.”
- “Open Settings.”
- “Open Bixby settings.”
- “Take a screenshot.”
If Bixby is unsure what you mean, it will ask for clarification instead of changing the wrong setting. This makes it fairly safe to try natural phrasing. Some actions, such as controlling smart-home devices, require extra permissions and a Samsung account.
Bixby and Modes and Routines
Older versions of One UI had a separate feature called Bixby Routines. In One UI 8.5, this automation system lives under Settings > Modes and Routines. Bixby works together with it in two ways. First, if you have a routine set up, you can trigger it with a voice command such as “Start driving mode.” Second, some builds allow you to create a routine that starts when you speak a Bixby command as the trigger. To see what is available on your phone, open Modes and Routines and inspect the list of trigger conditions and actions. Not every routine condition is available on every device.
Common Problems and How to Fix Them
“Hi Bixby” does not respond
Start with the simplest checks in order:
- Open Bixby and go to Bixby Settings.
- Make sure Voice wake-up is enabled.
- Retrain your voice from the same settings screen.
- Go to Settings > Apps > Bixby and confirm the microphone permission is allowed.
- Restart the phone and test again.
If the wake phrase works while the phone is unlocked but not while it is locked, check the lock-screen option inside Bixby Settings.
Bixby opens but cannot hear you
Another app may be using the microphone. If you are on a call, playing media, or recording audio, Bixby may refuse to listen. Stop the other audio activity and try again. It is also worth checking whether your phone’s case or screen protector is covering the microphone.
The Side key does not launch Bixby
Open Settings > Advanced Features > Side key and verify the assignment. If Bixby is not listed, your device may have a regional configuration that restricts it. In that case, use the on-screen Bixby app or “Hi Bixby” instead.
Bixby disappeared from the phone
Search the app drawer for “Bixby.” If it is gone, open the Galaxy Store, search for Bixby, and reinstall it. Some regional variants do not preload Bixby at all. You can also type “Bixby” into the Settings search bar, which usually reveals Bixby-related options even when the app icon is hidden.
Conclusion
The core Bixby settings in One UI 8.5 are simple to find once you know they live inside the Bixby app. The setup that works best for most people is: enable Voice wake-up, train your voice model, allow Bixby to respond on the lock screen, and assign the Side key as a backup. For daily use, Bixby is strongest as a quick way to change system settings, launch routines, and perform hands-free actions. If voice recognition becomes unreliable, retrain the voice model and check microphone permissions before doing anything more drastic.
