Short answer: Yes. You can call and text from a computer using a second number, but how it works depends on the path you choose. Your carrier line mirrors to a Mac through Apple Continuity; Android texts mirror to a browser through Google Messages; and an app-based second number like Text Call rides its own account, so the same line shows up on phone, tablet, and desktop at once.
The confusing part is that "call and text from computer" is really three different setups wearing the same sentence. One mirrors your existing carrier number to a nearby device. One mirrors only your texts to a web tab. The third gives you a separate second number that lives in the cloud and signs in anywhere. They sync different things, and they fail in different ways. Knowing which one you're using saves you an hour of "why won't my Mac ring."
The three ways to reach your number from a laptop
Before picking an app, it helps to see that the routes are not interchangeable. Each one answers "can I send texts and make calls from my laptop" with a slightly different yes.
| Route | What number it uses | What reaches the computer | Main limitation |
|---|---|---|---|
| Apple Continuity (iPhone + Mac) | Your existing carrier number | Calls and SMS/iMessage relay to a signed-in Mac on the same Apple ID | Tied to one iPhone nearby and one Apple ID; not a separate line |
| Google Messages for web (Android) | Your existing carrier number | Texts mirror to a browser via QR pairing; calls are not part of it | Phone must stay online; texting only, no calling |
| App-based second number (e.g. Text Call) | A separate second number on your account | Calls, texts, and voicemail sign in across phone, tablet, and desktop | Depends on data/Wi-Fi and the app's own multi-device support |
Two of these mirror a number you already have. Only the third hands you a distinct line you can give out without exposing your personal one. That is the difference between "my Mac can answer my cell" and "I have a real second number on every screen."
What a multi-device second line actually syncs
This is where people expect more than the docs promise, so here is the honest version. I have not run a stopwatch on every device combination and I am not going to print a fake "we tested 12 setups" table. What follows is what these platforms say they sync, plus how to confirm it yourself.
A cloud-based second number — the model Text Call uses — keeps the line attached to your account rather than to one SIM. According to the official Text Call multi-device support documentation, the things that typically travel across devices are call history, text threads, and voicemail, because they live on the account, not on a single handset. Sign in on a tablet and the same conversation list usually appears. That is the whole point of a second-line app versus a SIM.
Claim: A cloud second number can show the same texts, call log, and voicemail on phone, tablet, and desktop.
Evidence: This is the stated design of account-based second-line apps, per the Text Call multi-device support docs.
Limit: "Typically syncs" is not "guaranteed on every OS version" — simultaneous ringing on multiple devices and live call handoff vary by app and platform.
Action: Verify on your own two devices before you rely on it for anything important (method below).
Common limitations are worth naming up front. Apple's Phone and Continuity documentation describes relaying your iPhone's calls to a Mac, but that is your carrier number, and it needs the iPhone nearby on the same Apple ID — it is not an independent line you can hand out. Google's Messages for web help describes pairing a browser to mirror texts, but it is texting only and the phone has to stay connected; it does not put your calls on the laptop. So if your goal is a separate number that calls and texts from a computer on its own, the carrier-mirroring routes will leave you short, and an app-based second number is the closer fit.
A method you can run in five minutes
Instead of trusting a generic sync chart, test the behavior that matters to you. This is reproducible on any second-number app and tells you more than a review ever will.
- Sign in on two devices — say your phone and a laptop browser or desktop app — using the same account.
- Send yourself a text from a third number. Note whether it appears on both signed-in devices and how fast.
- Place a call to your second number. Watch which devices ring: one, both, or none. Simultaneous ring is the feature most apps differ on.
- Leave a voicemail, then hang up. Check whether the voicemail and the missed-call entry show up on the device you were not holding.
- Go offline on the phone (airplane mode) and retry a text from the desktop. This reveals whether the desktop is truly independent or just a mirror of the phone.
Step five is the one that separates a real second line from a screen mirror. If the laptop still works with the phone fully offline, you have an account-based number. If it goes dead the moment the phone drops, you were mirroring a handset the whole time.
A note on which services accept the number
People often want a second number for sign-ups and verification codes, and this is where I'll be careful. Whether a given bank, app, or website accepts a VoIP or app-based number for SMS verification is not something I can promise from a chart — policies change and vary by service. The FCC's public guidance explains that internet-based (VoIP) calling and numbers are a recognized, regulated category, which is useful background, but it does not list who accepts them. So the honest move is to test: try to receive one verification code on the number before you commit it to an account you care about. If the code arrives, you're set; if not, that service is blocking VoIP and no article can override its policy.
FAQ
Can I make actual phone calls from my computer, or just texts?
Both, depending on the route. An app-based second number like Text Call signs in on a desktop and handles calls, texts, and voicemail on the same line. Apple Continuity also relays carrier calls to a Mac. Google Messages for web, by contrast, mirrors texts only — it does not put calls on the browser.
Do my texts and call history sync if I add a tablet later?
With a cloud-based second number they generally do, because the line lives on your account rather than a SIM. Per the Text Call multi-device support docs, call history, text threads, and voicemail typically appear when you sign in on a new device. Confirm it by signing in on the tablet and checking that the existing threads load.
Will my computer and phone both ring at the same time?
Sometimes — this is the feature that varies most. Some second-line apps ring every signed-in device; others ring one and leave a missed-call entry on the rest. There is no universal rule, so test it: call your number and watch which devices light up before you depend on simultaneous ring.
Does my phone have to stay on for the desktop to work?
It depends on the route. Google Messages for web needs the Android phone online because it mirrors that phone. An account-based second number should work with the phone fully offline, since the desktop signs into the cloud directly. The airplane-mode test above tells you which one you have.
Can I use a second number to send a fax from my laptop too?
A second number is for calls and texts, not fax — those run on different protocols. If you also need to send a document by fax from the same phone or computer, that is a separate scan-to-fax tool. Fax Scan handles the paper-to-fax path from the devices you already have, which fits naturally alongside a multi-device calling setup.
What I'd do
Decide what you actually want before you install anything. If you only need your existing cell to reach your Mac, Apple Continuity already does it — no app required. If you want texts on a browser, Google Messages for web covers Android. But if the goal is a separate second number that you can call and text from a computer, tablet, and phone at once — a number to hand out without exposing your personal one — an app-based line is the only route that fits, and you should run the five-minute test above to confirm what syncs on your own hardware. Text Call is built by CodeBaker, which makes a small family of phone-first utilities for exactly these "I need this working on every screen" moments.