I’ve spent the last few weeks bouncing between a Pixel 8a on stock Android 16, a Samsung Galaxy S23 on One UI 7, and a budget Xiaomi running HyperOS, specifically to see how much these menus actually diverge. Short version: the core settings exist on every device, but the labels and tap-paths wander enough to genuinely confuse people. This guide walks through each one with the real menu names, not the idealized “stock Android” version most tutorials assume you have.

How to Change Default Apps & File Handlers on Android

Every time you tap a web link, open a photo, or send a text, Android quietly decides which app handles it. Those decisions are called default apps, and you have full control over them — you just have to know where Google buried the menu on your specific phone.

If none of these match what’s on your screen, the fastest fix is the search bar inside Settings — type “default apps” and let the phone find its own menu. I use this shortcut constantly on review units where the manufacturer has moved things around for no obvious reason.

Changing Default Browsers, Phone, and Messaging Apps

1. Open Settings and go to Apps.
2. Tap Default apps (or find it via the three-dot menu on Samsung/Xiaomi).
3. You’ll see a list of categories: Browser app, Phone app, SMS app, Digital assistant app, and sometimes Home app (launcher).
4. Tap the category you want to change — for example, Browser app.
5. Select your preferred app from the list. There’s no save button; the switch happens the instant you tap.

One quirk worth flagging: the app only shows up in this list if it’s already installed and registered as capable of handling that role. If you don’t see Firefox as a browser option, for example, it usually means the app hasn’t finished its first launch — open it once, let it run through its setup screens, then check the default apps menu again. If you’re setting a browser default specifically to keep certain sites off a shared or kid’s device, our guide on blocking adult content on Android walks through the filtering side of that setup.

Resetting App Links (“Open by Default” Associations for Specific Files)

Here’s where most guides fall apart, because file-type associations (PDFs, .jpg images, Instagram links) don’t live in the main Default apps screen — they live inside the individual app’s own settings page. Since Android 12, Google actually removed the old global “Opening links” screen, so this per-app method is now the only route on modern versions.

1. Go to Settings → Apps and find the app that’s currently “hijacking” the file type (e.g., the PDF reader that keeps opening instead of the one you want).
2. Tap the app, then tap Open by default.
3. Tap Clear defaults.
4. The next time you tap that file type or link, Android will show you the chooser dialog again — pick “Always” next to your preferred app to lock in the new default.

If the “Open by default” option doesn’t appear at all, that’s usually because the app has never actually been set as a default for anything yet — there’s nothing to clear. In that case just wait for the chooser prompt next time and select “Just once” instead of “Always” until you’re ready to commit.

Tracking Usage: How to Check Screen-On Time

Using Digital Wellbeing to View Screen Time and App Usage Statistics

Every Android phone running Android 9 or later ships with Digital Wellbeing built in — no separate app to install. It’s been rebranded slightly by manufacturers (Huawei calls its version “Digital Balance”), but the underlying feature is the same.

1. Open Settings and tap Digital Wellbeing & parental controls.
2. The dashboard opens directly to today’s screen time, shown as a colored ring broken down by app category.
3. Tap the ring or the total time number to open the full Dashboard view, with a 7-day chart and per-app minutes.
4. Tap any individual app in the list to see a longer usage history and set an App timer that grays out the icon once you hit your daily limit.

A genuinely useful trick most people miss: long-press your home screen, tap Widgets, and drag the Digital Wellbeing widget onto your home screen. It shows your running screen time total without needing to open Settings at all, and I’ve found it does more to curb mindless scrolling than the app timers themselves. If you can’t find the menu by scrolling, typing “wellbeing” into the Settings search bar gets you there in one tap on every device I tested.

What Is Android System Intelligence?

Android System Intelligence (ASI) is the system-level component — previously called Device Personalization Services — that powers most of the “smart” features you don’t consciously turn on: Live Caption, Now Playing, app predictions in the launcher, Smart Text Selection, and the contextual action buttons that show up on notifications. It runs inside Google’s Private Compute Core, a sandboxed part of the OS specifically designed so this processing happens on-device rather than being shipped to a server for analysis.

It’s worth being precise here, because a lot of write-ups blur this: ASI is not Gemini. Gemini is Google’s conversational assistant app; ASI is the quieter infrastructure layer that predates it and keeps running in the background regardless of which assistant app you use.

On-Device AI Features: Live Translate, Smart Replies, and Contextual Actions

Under the ASI umbrella, the features you’ll actually notice day to day are:

• Live Translate — translates live text conversations and streaming video in real time, entirely on-device.
• Smart Text Selection — long-press an address and it selects the whole string, then offers a “Get directions” shortcut instead of leaving you to select word by word.
• Now Playing (Pixel-exclusive) — silently identifies ambient music using a locally stored song database and shows the title on your lock screen.
• Notification actions — adds buttons like “Add to contacts” or “Track package” directly inside a notification, pulled from the text it detects.
• Linkify — turns plain text like phone numbers or addresses into tappable links inside apps that don’t natively support that.

All of these run offline by design — that’s the entire point of the Private Compute Core architecture. If you’re on a flight in airplane mode, Live Caption and Smart Text Selection still work exactly the same way.

Is It Safe? Privacy Concerns and Battery Impact

On most Pixel and stock-Android devices you can’t fully uninstall ASI, but you can disable it or clear its cache from Settings → Apps → See all apps → Android System Intelligence. If your battery use spike coincides with a recent Android System Intelligence update, that’s a genuine, commonly reported pattern — it’s usually temporary while the app rebuilds its cache, but if it doesn’t settle down after a few days, disabling it is a reasonable troubleshooting step rather than something to be nervous about. If disabling it doesn’t move the needle and you’re chasing a battery drain problem more broadly, it’s worth ruling out hardware causes too — our Android phone not charging guide covers the charging-port and cable checks that often get missed.

Connectivity & Setup Adjustments

How to Turn Off Wi‑Fi Calling (When to Disable It)

Wi‑Fi Calling (also called VoWiFi) routes your calls over a Wi‑Fi network instead of the cell tower, which is genuinely useful in basements or rural spots with weak signal. But it can also cause dropped calls on unstable public Wi‑Fi, occasionally delay incoming calls, and generate repeated notification nags on some carriers.

1. Open Settings and go to Network & internet (labeled “Connections” on Samsung).
2. Tap SIM & network, then select your active SIM if you have more than one.
3. Tap the toggle next to Wi‑Fi Calling to switch it off.
4. On dual-SIM phones, repeat the process for the second SIM — the toggle is set independently per line.

Turn it off if you’re getting constant call-quality complaints on shaky public Wi‑Fi, or if a Samsung Members-style battery report is attributing an outsized chunk of drain to Wi‑Fi Calling specifically. Leave it on if you regularly work from a basement office or a metal-frame building where cell signal is genuinely weak — the call-quality upside there is real, and for most people the battery cost is small enough not to matter. If your Wi‑Fi itself keeps dropping regardless of calling settings, it’s worth comparing router standards — see our Wi‑Fi 6 vs Wi‑Fi 7 breakdown — and if you’re seeing the same disconnects across an iPhone on the same network, our iPhone Wi‑Fi disconnect guide points to router-side causes that affect every device on the network, not just Android.

How to Find Your Android Phone’s Local & Public IP Address

Your phone actually carries two different IP addresses, and they serve completely different jobs.

To find your local IP: go to Settings → Network & internet → Wi‑Fi, tap the gear icon next to your connected network, then tap Advanced or View more. The IP address sits alongside the gateway and DNS details, usually starting with 192.168.

To find your public IP: Android doesn’t expose this in settings at all, because your router deliberately hides your network’s internal structure for security. The quickest workaround is opening your browser and searching “what is my IP” — the answer appears directly at the top of the results.

Knowing these matters most when you’re setting up port forwarding for a game server, troubleshooting why a smart home device can’t find your phone on the network, or diagnosing why an app insists your connection is “unrecognized.” If your local IP keeps changing every time you reconnect, that’s normal DHCP behavior unless you’ve specifically requested a static IP from your router — it isn’t a sign anything’s broken.

How to Activate and Set Up an Android Phone Without a SIM Card

Yes, you can set up and run an Android phone entirely on Wi‑Fi, no SIM or eSIM required. This is the standard route for using an old phone as a dedicated media player, a smart-home controller, or a kid’s first device.

1. Power on the phone. When the setup wizard asks you to insert a SIM, tap Skip (sometimes labeled “Set up without SIM” or “Maybe later”).
2. Connect to a Wi‑Fi network when prompted — this step is essentially mandatory, since you need internet access to sign into a Google account and download apps.
3. Sign in with your Google account and complete the rest of setup as normal (backup restore, biometrics, default apps).
4. Once you reach the home screen, everything works over Wi‑Fi: app installs, browsing, email, and any app that makes calls over the internet rather than the cellular network.

The real limitation is regular calling and texting — without a SIM, the phone has no cellular voice or SMS connection, full stop. What still works even with zero SIM inserted: emergency calls. Android is required by regulation to let you dial emergency numbers (911, 112, and similar) on any available network signal, even one your device isn’t registered to. For everyday calls and texts on a SIM-free device, apps like Google Voice or WhatsApp give you a working number over Wi‑Fi instead. And if you’re moving your SIM and data into a new phone as part of this process, make sure your texts and photos actually made the jump first — our guide on recovering deleted photos and SMS on Android covers what to do if something didn’t transfer cleanly.

A Few Extra Fixes Worth Knowing

A handful of related settings didn’t make the outline above but come up constantly once people start digging through this part of Android.

• Resetting every default app at once: instead of clearing associations one app at a time, go to Settings → Apps → See all apps → ⋮ → Reset app preferences. This restores disabled apps, re-enables notifications you’d muted, and clears every “always open with” choice system-wide — useful after a messy phone hand-me-down, but be aware it resets more than just defaults.
• Wi‑Fi Calling toggle reverting on its own: some carrier profiles re-enable Wi‑Fi Calling after a software update or SIM swap even though you turned it off. If it keeps flipping back, a carrier-side APN reset (via Settings → Network & internet → SIM & network → Access Point Names → Reset to default) usually fixes it — though this is genuinely a case where your carrier’s support line can diagnose it faster than trial and error on your end.
• Screen time not matching what you remember: Digital Wellbeing counts a “session” from screen-on to screen-off, so glancing at a notification and locking the phone again still logs a few seconds. It’s an accurate log of screen-on time, not a measure of focused attention.

If your touchscreen becomes unresponsive partway through any of these menu changes — which does happen on phones with a failing digitizer — don’t assume you did something wrong in Settings first; rule out a hardware issue using our Android touchscreen not responding guide before you keep troubleshooting software.

FAQ

Why can’t I find “Default apps” in my Settings?

It’s almost always a naming or nesting issue rather than a missing feature. Type “default apps” into the Settings search bar — every Android skin we tested surfaces the correct menu that way, even when it’s buried three taps deep under a three-dot icon.

Does clearing a default app delete any of my data?

No. Clearing a default only removes the association telling Android which app to auto-launch; it doesn’t touch the app’s files, logins, or settings. The app itself stays fully installed and untouched.

Is Android System Intelligence the same thing as Gemini?

No — they’re separate components. Gemini is the conversational assistant app you talk to directly; ASI is the background infrastructure that has powered features like Live Caption and app predictions since well before Gemini existed on Android.

Does turning off Wi‑Fi Calling affect my texts?

No. Wi‑Fi Calling only governs voice calls routed over Wi‑Fi. Regular SMS and RCS messaging continue working over your normal cellular data or Wi‑Fi data connection regardless of this toggle’s position.

Can I use an Android phone permanently with no SIM at all?

Yes, as long as you’re near Wi‑Fi. Browsing, apps, email, and internet-based calling (Google Voice, WhatsApp, and similar) all work fine. You’ll only lose traditional cellular calls, SMS, and mobile data away from Wi‑Fi.

How I Tested These Settings

Every step above was walked through by hand on a Pixel 8a (Android 16), a Samsung Galaxy S23 (One UI 7), and a budget Xiaomi phone on HyperOS, rather than assuming one device’s menu structure applies everywhere. The one genuine bug worth flagging: on the Xiaomi unit, clearing a default under “Open by default” occasionally required a full app-list refresh (backing out to the main Apps screen and back in) before the “Open by default” option would even appear for a freshly installed app — a known HyperOS quirk, not something you’re doing wrong. This is a personal, hands-on account, not professional technical support — for anything involving carrier-side configuration, IMEI issues, or hardware faults, your carrier or a certified repair technician will get you a faster and more reliable answer than trial-and-error in Settings.

Conclusion

Android gives you a genuinely unusual amount of control over how the phone behaves — which app opens what, how much of your day it tracks, how much AI runs quietly in the background, and even whether it needs a SIM card at all. The menus move around between manufacturers, but every setting in this guide exists on every modern Android phone; you’re just occasionally hunting one extra tap for it. Bookmark this if you’re switching devices often, since re-doing your defaults and Wi‑Fi Calling preference is one of the most common things people forget after a phone swap.