How to Use Gemini AI on Your Android Phone

If you have held the power button lately, you may have noticed your phone answering in a different voice. Google is swapping out the old Google Assistant for Gemini, its conversational AI, and the change has been rolling out across Android through 2025 and into 2026. This guide walks you through turning it on, setting it up the way you want, and using it for real, everyday things. It also covers the privacy switches worth knowing about and, just as honestly, where Gemini still trips over tasks the old Assistant handled fine.

For years, the helper on your phone was Google Assistant. It was good at short commands: set a timer, what is the weather, call Mom. Gemini is a different kind of tool. It is built on Google's generative AI models, so it holds a back-and-forth conversation, understands what you mean across a few sentences, and can write, summarize, and reason rather than just react to single commands.

Google originally planned to finish replacing Assistant in 2025, then pushed the full transition into 2026 to smooth out the handover. The standalone Assistant app is going away on phones and tablets, and the separate iOS app is being retired too. The rollout is gradual and varies by device and region, so your phone and a friend's may not switch on the same day.

One thing to set expectations on: this is not just a new name on the same helper. Some long-standing Assistant habits behave differently now, and a few have been dropped. We get to those near the end.

Gemini is forgiving about hardware, but a few basics matter.

1. A Google Account, signed in. Work or school accounts can use it too, though an administrator may limit what is available.
2. The app, up to date. Make sure both the Google app and the Gemini app are current. Open the Play Store, tap your profile picture, then Manage apps and device, and update anything pending. An old Google app is the most common reason the assistant switch does not show up.
3. A supported region and language. Gemini is not in every language or country yet, and some features such as the "Hey Google" wake phrase are narrower still.
4. Age and supervision. Supervised accounts for kids under 13 can have Gemini restricted through Family Link.

The conversational camera and screen-sharing parts (more below) run on phones with 2 GB of RAM or more on Android 10 and up, so most phones from the last few years qualify.

You have two equally good routes. Pick whichever you reach faster.

From the Gemini app:

1. Install Gemini from the Play Store if it is not already there.
2. Open it, tap your profile picture in the top-right, then Settings.
3. Tap Digital assistants from Google and choose Gemini.
4. Follow the short on-screen prompts.

From the Google app: open it, tap your profile picture, then Settings > Google Assistant > Digital assistants from Google > Gemini.

On a Pixel: the path above works as written. To check it stuck, go to Settings > Apps > Default apps > Digital assistant app and confirm the Google app is selected.

On a Samsung Galaxy (One UI): the assistant control lives in a slightly different spot. Go to Settings > Apps > Choose default apps > Digital assistant app, tap it again, and pick Gemini, then OK. Separately, the press-and-hold side button is its own setting. From One UI 7 onward, holding the side button launches Gemini by default, but you can change it under Settings > Advanced features > Side button > Press and hold, where you can pick Gemini, Bixby, or the power-off menu.

Once set, you can summon Gemini by holding the power or side button, swiping from a bottom corner, or saying "Hey Google" where that phrase is supported. Google's own walkthrough is here if you want the official version: Get started with the Gemini app. Samsung explains the One UI 7 side-button change in its own support note.

Out of the box, Gemini will chat with you but will not touch your email or calendar. The connections that let it take action are called Connected Apps, and a couple are worth turning on deliberately.

1. In Gemini, tap your profile picture > Settings > Connected apps.
2. Toggle on the ones you want. Utilities is the important one: it lets Gemini set alarms and timers, change device settings, and open the camera. It is often off by default.
3. Turn on Gmail, Google Maps, Calendar, Keep, Tasks, and others as it suits you. On Galaxy S25 phones, Gemini can also reach into Samsung apps such as Calendar, Notes, Reminder, and Clock.

Older guides told you to type @Gmail or @YouTube to call a specific app. Google has been retiring that symbol in favor of plainer phrasing, so you can now just ask naturally, for example "check my email for the dentist confirmation." A small note: to pull public info from Google Maps, Flights, Hotels, or YouTube, your Gemini Apps Activity (covered below) needs to be on. Google explains what each connection reaches in its Connected Apps help page.

Here is where Gemini earns its place, with small examples you can try today.

• Summarize a long email or thread. Open a wall-of-text message, summon Gemini, and ask "summarize this and tell me if I need to reply."
• Draft and tidy writing. "Write a polite three-line reply declining this meeting." Then "make it warmer." You keep nudging it instead of starting over.
• Ask about your screen. Pull up the Gemini overlay on almost any screen and you get a "Circle anything or ask about this screen" prompt, much like the older Circle to Search. Circle a product photo to identify it, or ask about a paragraph on screen.
• Talk through your camera. With Gemini Live, point your camera at something and ask about it: "what setting on this washing machine is gentlest?" You can interrupt it mid-sentence and change topic, which feels more like a call than a search box.
• Plan across apps. "Find a ramen place near the cinema and remind me to book a table Friday." If Maps, Tasks, and Calendar are connected, it stitches those together in one request.
• Everyday answers. Unit conversions, a recipe scaled for six instead of four, a word in another language. If you are learning one, it pairs well with a dedicatedlanguage learning app.

Gemini handles the thinking, but it does not replace purpose-built tools. For tidy meeting notes, a real notes app still wins, and for turning a paper document into clean text you will want one of the scanner apps rather than a photo of it.

Most of what Gemini does happens in Google's cloud: your words travel to a server, the AI thinks, and the answer comes back. That is why the heavier conversations need a connection.

Some phones also run a smaller model called Gemini Nano directly on the device. Because the work stays on the phone, certain features keep working with no signal and without sending that data away, which is friendlier for privacy and spotty coverage. As of 2026, Nano runs with full support on the Pixel 8, 8 Pro, 8a, 9, 9 Pro, and 9 Pro XL through Google's on-device AICore system. Samsung Galaxy S24 phones get a subset through Samsung's own AI layer, and other phones with high-end Snapdragon 8 Gen 3 chips are gaining support over time.

The practical takeaway: do not assume everything works offline. A few small on-device features may; the rich conversational answers will not. If you have no bars and Gemini stalls, that is usually the connection, not a bug.

By default, your chats help improve Google's services, and a sample of conversations can be read by trained human reviewers to make the AI better. If that is not for you, here is how to change it.

1. In Gemini, open profile picture > Settings > Gemini Apps Activity.
2. Turn the switch off to stop new chats being saved to your activity and used to train the models, unless you separately send feedback.

One detail to know: even with this off, Google holds your interactions for up to 72 hours to run the service and keep it safe, then they drop off. A side effect of turning it off is that Gemini can only continue a conversation if you reply within that 72-hour window; after that, older threads disappear.

You can also manage history at myactivity.google.com/product/gemini, where you can delete past chats or set auto-delete after 3, 18, or 36 months. There is a useful middle ground worth highlighting: you can now use Gemini as your phone assistant, placing calls, sending messages, and changing settings, without keeping Apps Activity on, so basic helper duties no longer force you to feed every word into the training pipeline. The full rules sit in Google's Gemini Apps privacy hub. If privacy across your whole phone is on your mind, it is worth a wider look with our Android security and antivirus guide.

You do not need to pay to use Gemini. The free tier covers chat, summarizing, drafting, image generation, Gemini Live, Canvas, and custom Gems, plus the 15 GB of Google storage shared across Gmail, Drive, and Photos. The catch is usage caps: heavier tools are rate-limited, and the Deep Research feature, which compiles a longer cited report, is held to roughly 5 runs a month on the free plan.

The paid plans, as of 2026, look like this:

• Google AI Plus at $4.99 a month: about double the free usage limits, video generation, deeper NotebookLM features, Gemini inside Gmail and Docs, and 400 GB of storage.
• Google AI Pro at $19.99 a month: roughly four times the free limits, full access to the top Gemini model in more places, Gemini across Google apps, and 5 TB of storage.
• Google AI Ultra, the premium tier, starts around $99.99 a month and goes higher, aimed at heavy and professional users with much larger limits and 20 TB or more of storage.

Google has also moved to compute-based limits that refresh every few hours up to a weekly ceiling. For most people, the free tier is plenty; pay only if you keep bumping into caps on long research or image work. Current plan details live on Google's subscriptions page.

Gemini is capable, but the handover from Assistant has left some rough edges, and it is fair to know them before you rely on it.

• Simple basics can stumble. Users have reported Gemini fumbling things the old Assistant nailed: placing a call to a contact, setting a plain timer or alarm, and handling a quick follow-up. Turning on the Utilities connection helps with timers and alarms, but it is not flawless.
• Routines are weaker. Google Assistant's custom Routines, which chained several actions to one phrase, are not fully matched. Media playback commands have also been patchy.
• Smart home is uneven. The separate Gemini for Home rollout has been bumpy, with reports of it getting tasks wrong and missing features. On some Nest displays Gemini has refused to control lights that the phone version handles fine. Continued conversation, asking a follow-up without repeating the wake phrase, was dropped for free on Home devices.
• It can be confidently wrong. Like any generative AI, Gemini sometimes invents details. For anything that matters, money, medical, legal, travel dates, treat its answer as a starting point and verify it.

If a task keeps failing, you are not doing it wrong. Google is still filling these gaps, and the old Assistant lingers in places during the transition.

Small adjustments go a long way.

• Let it answer from the lock screen, carefully. In Gemini's settings you can allow it to respond while the phone is still locked, handy for hands-free voice while cooking or driving. Leave it off if you would rather no one could poke at your assistant when the screen is locked.
• Keep prompts conversational. You do not need keyword-speak. "Remind me to take the bins out tomorrow morning" works better than clipped commands.
• Know how to step back. If Gemini is not working for you, the same Digital assistants from Google setting switches back to Google Assistant where it is still offered. Nothing about trying it is permanent.

Give it a week of real use before you judge it. The conversational style takes getting used to after years of barking single commands, but for summarizing, drafting, and talking through what is on your screen, it does things the old helper never could.