Anamika Dey, editor
By TechSun News Desk | techsunnews.com | July 23, 2026 | Tech / AI | 10 min read
You never installed it. You never agreed to it in any moment you’d actually remember. But right now, your phone is running a stack of AI features that arrived quietly in an update summarizing your texts, ranking your notifications, suggesting your replies, and in some cases sending pieces of your day to a server somewhere to do it.
This guide is not a scare piece, and it is not a list of things to switch off. Some of these features are genuinely good. Live translation is a small miracle if you travel. On-device photo cleanup saves real time. Call transcription is a serious accessibility win for anyone hard of hearing. The point is simply that you should know what’s running, what each one costs you in privacy or battery, and then decide for yourself rather than having the decision made for you by a default.
One thing worth knowing up front, especially for US readers: where you live changes what’s switched on. Privacy researchers at Tuta have documented that Google’s smart features are off by default in the European Economic Area, the UK, Switzerland and Japan, while users everywhere else including the United States get them on by default and have to turn them off manually. If you’re reading this from the US, assume more is enabled than you’d guess. If the terminology gets thick, our plain-English guide to AI terms covers the vocabulary.
First: what “on-device AI” actually means (and why it matters here)
Some of these features run entirely on your phone’s own chip. Others send your data to a company server, process it there, and send the answer back. That distinction is the single most useful thing to understand before you decide what to keep, because it determines whether your message, photo or voice ever leaves the device at all. We covered the technology behind this shift in our explainer on Edge AI and why AI is moving from the cloud to your phone — this guide is the practical follow-up.
As a rough rule: on-device processing is more private but sometimes less capable, and cloud processing is more capable but means your data travels. Several phones now let you choose. On a Samsung Galaxy S25, for instance, Settings › Galaxy AI has a toggle labelled “Process data only on device” turning it on keeps things local, with the honest tradeoff that some tools get more limited (translation supports fewer languages, for example, because it’s working from local files rather than cloud databases).
The 10 features worth knowing about
1. Notification summaries
Your phone condenses a stack of messages into a one-line preview so you can scan it at a glance. On iPhone this is Apple Intelligence; Android does similar things across apps.
Why keep it: genuinely useful for busy group chats and long email threads, where you just want the gist.
Why you might not: this is the most error-prone feature on the list. Apple temporarily paused news notification summaries after they generated inaccurate headlines, and flattening an emotional message into a robotic one-liner can badly miss the point.
Where to change it: iPhone — Settings › Notifications › Summarize Notifications, which you can switch off entirely or tune per app. There’s also Prioritize Notifications in the same menu, which pushes what Apple deems important to the top. On iOS 18.3 and later you can also swipe left on a summary right from the lock screen, tap Options, and turn off summaries for just that app.
2. AI writing tools
Rewrite, proofread, change tone, summarize — built into the keyboard and mail apps on both platforms.
Why keep it: excellent for catching typos and for anyone writing in a second language. Low privacy cost when it runs on-device.
Why you might not: it can quietly flatten your voice into generic corporate phrasing, and cloud-based versions mean your draft leaves your phone.
Where to change it: iPhone — these are part of Apple Intelligence (Settings › Apple Intelligence & Siri). Android — depends on your keyboard and maker; check your keyboard app’s own settings.
3. AI photo editing
Remove an object, erase a photobomber, expand a background, sharpen a blurry face. Apple calls its version Clean Up; Samsung groups Generative edit, Sketch to image and Portrait studio under Photo assist; Google has Magic Editor.
Why keep it: the most practically useful AI on most phones. Removing a stray bin from a holiday photo used to take Photoshop skills.
Why you might not: heavier edits may upload your photo to a server for processing, and there are real questions about editing images of people. If that bothers you, look for the on-device option.
Where to change it: Samsung — Settings › Galaxy AI › Photo assist, where you can disable the whole group or individual tools. iPhone — governed by the Apple Intelligence toggle.
4. AI call summaries and transcription
Your phone records, transcribes and summarizes a call, or screens unknown callers for you.
Why keep it: a significant accessibility feature for deaf and hard-of-hearing users, and genuinely handy for work calls. Call screening is also an effective spam filter.
Why you might not: the legal and ethical wrinkle — recording a call may require the other person’s consent depending on your state, and a transcript of a private conversation is sensitive data by definition.
Where to change it: in your Phone app’s own settings on both platforms; look for Call recording, Call notes or Call screening.
5. The AI voice assistant that replaced your old one
On many Android phones, Gemini has replaced Google Assistant — often taking over the power-button long-press in the process. On iPhone, Siri now routes some requests to Apple Intelligence and can hand off to ChatGPT.
Why keep it: far more capable than the old assistants at anything conversational or multi-step.
Why you might not: it’s the feature most likely to send what you say to a server, and many people simply preferred the predictable old assistant for timers and calls.
Where to change it: Pixel — open the Gemini app, tap your profile picture, and choose Switch to Google Assistant. Samsung/Android generally — Settings › Apps › Gemini › Disable (you can’t uninstall it, but disabling stops it running). Samsung also lets you remap the side button so a long press doesn’t summon it. iPhone — Settings › Apple Intelligence & Siri › Extensions controls the ChatGPT handoff separately from Siri itself.
6. AI search features (Circle to Search, AI Mode, AI Overviews)
Circle anything on screen to search it; AI-generated answers appear above normal search results.
Why keep it: Circle to Search is one of the genuinely clever ideas of the last few years — identifying a plant, a jacket, a phrase, without leaving the app.
Why you might not: it sends whatever is on your screen to Google, and AI-generated answers can be confidently wrong.
Where to change it: Pixel — Settings › System › Circle to Search. For AI Mode in the search bar, open the Google app › profile picture › Settings and turn off the Gemini button.
7. Contextual suggestion engines (Magic Cue and friends)
The newest and least-noticed category: features that watch what you’re doing across apps and surface information before you ask. Google’s Magic Cue on Pixel 10 is the clearest example.
Why keep it: when it works, it feels like the phone is genuinely helping — pulling up a booking reference exactly when you’re asked for it.
Why you might not: to do that, it needs broad visibility across your apps and data. This is the feature on this list that requires the most trust.
Where to change it: Pixel — Settings › Magic Cue, then turn off Use Magic Cue.
8. Live translation
Real-time translation of conversations, calls, text in the camera view, and messages.
Why keep it: the strongest argument on this entire list for leaving AI on. If you travel, or have family who speak another language, this is transformative.
Why you might not: cloud translation means the content of your conversation is processed remotely. Note the tradeoff if you switch to on-device only: fewer supported languages.
Where to change it: Samsung — Settings › Galaxy AI, where translation tools are listed individually. iPhone — part of Apple Intelligence.
9. Smart features scanning your email and files
Not strictly a phone setting, but it shows up on your phone: Google’s smart features let Gemini draw on your Gmail, Drive, Photos and Chat to answer questions and summarize.
Why keep it: summarizing a long email thread or finding a document by description rather than filename is a real time-saver.
Why you might not: it means an AI system has access to the contents of your inbox and files. As noted above, this is on by default for US users and off by default in the EEA, UK, Switzerland and Japan.
Where to change it: in Gmail’s settings, look for Smart features and turn off the box covering Gmail, Chat and Meet.
10. The AI model quietly installed on your device
The one almost nobody knows about. Chrome on desktop silently downloaded a roughly 4GB on-device model called Gemini Nano to most installs in early 2026 — reported by Tuta and other privacy researchers. On iPhone, Apple Intelligence’s on-device models occupy up to about 7GB.
Why keep it: local models are what make the private, offline version of these features possible in the first place.
Why you might not: it’s several gigabytes of storage you didn’t choose to spend.
Where to change it: Chrome desktop — chrome://settings › System › turn off On-device AI to remove the model, and under You and Google › AI features, turn off Page content sharing. iPhone — switching off Apple Intelligence entirely (Settings › Apple Intelligence & Siri) removes the models and frees up to about 7GB.
The privacy settings worth reviewing while you’re in there
- Your AI activity history. Gemini and ChatGPT both store your conversations and use them to improve their models
unless you say otherwise — our guide to deleting what AI knows about you has the exact steps for each. - App permissions. AI features often need microphone, camera or screen access. Check what you’ve granted; our piece on what your phone already collects covers the everyday ones.
- On-device vs cloud toggles. If your phone offers the choice — as Samsung’s does — this is the single highest-value privacy setting on this list.
- Screen and content sharing. Features that read what’s on your screen deserve a deliberate yes, not a default one.
| ✅ Features most people should probably keep on
If you take one thing from this guide, make it this: switching everything off is not the smart move. These are the ones that earn their place.
The ones worth a harder look: notification summaries (frequently wrong), broad contextual engines like Magic Cue (they need the most access), and anything that reads your screen or inbox by default. |
Final recommendations
- Spend ten minutes auditing what’s actually on. Samsung users have it easiest — Settings › Galaxy AI lists everything in one place. iPhone users should check Settings › Apple Intelligence & Siri. Pixel users have to go feature by feature.
- Choose on-device processing wherever your phone offers it. Best privacy-to-benefit ratio available.
- Turn off notification summaries for messages if accuracy matters to you — and keep them for newsletters and low-stakes apps, where they’re actually helpful.
- Keep the accessibility and translation features. Don’t sacrifice genuine utility to a blanket policy.
- Re-check after every major OS update. New features arrive switched on, and settings can quietly reset.
| 💬 Over to you
Which AI feature on your phone do you actually use?
Tell us in the comments which one surprised you. |
Frequently Asked Questions
How do I turn off all AI features on my iPhone?
Go to Settings › Apple Intelligence & Siri and switch off the Apple Intelligence toggle, then tap to confirm. This disables Writing Tools, notification summaries, Genmoji, Image Playground, Visual Intelligence, Clean Up in Photos and the ChatGPT handoff in one step, and removes the on-device models — freeing up to around 7GB of storage. Your standard iPhone experience and classic Siri keep working normally. If you’d rather keep some features, skip the master switch and disable them individually instead.
Can I remove Gemini from my Android phone?
You can’t uninstall it on most devices, but you can disable it: go to Settings › Apps, find Gemini, and tap Disable — that stops it running in the background. On a Pixel you can also open the Gemini app, tap your profile picture and choose Switch to Google Assistant. Samsung owners can additionally remap the side button so a long press no longer launches it.
Do AI features drain my battery or storage?
Both, to a degree. On-device AI models take real storage — roughly 7GB for Apple Intelligence, and about 4GB for the Gemini Nano model Chrome installed on desktop in early 2026. Battery impact is usually modest for occasional use but adds up with always-on features like contextual suggestion engines. Disabling the features you don’t use reclaims both.
Is on-device AI more private than cloud AI?
Yes, meaningfully. On-device processing means your photo, message or voice clip never leaves your phone, so there’s no server-side copy and nothing to intercept in transit. The tradeoff is capability — local models are smaller, so features like translation may support fewer languages. Where your phone offers the choice, such as Samsung’s “Process data only on device” setting, it’s usually the best balance available.
| ✍️ Editor’s Observation
Writing this, what bothered me wasn’t any individual feature — several of them I use and like. It was the pattern of arrival. Almost everything on this list showed up switched on, in an update, described in language chosen to sound helpful rather than accurate: “smart features,” “personalize,” “improve.” None of them say “read your inbox” or “send your screen to a server,” because that’s a harder sell. The fix isn’t paranoia, and it certainly isn’t switching everything off — that costs you real things, like translation and accessibility tools that genuinely help people. The fix is just ten minutes and a decision that’s actually yours. |
— TechSun News, AI Desk
