Second Business Line App: g100.us Just Works

By The MiniConvert Editorial TeamReviewed & updated September 14, 2026

The fastest way to get a second business line: pick a number from g100.us, choose your country, and start calling, texting, and WhatsApp-ing from it in under a minute — no SIM card, no carrier store, no contract. Calls, SMS, and WhatsApp all run through one dashboard at app.g100.us, and the same number follows you on the g100.us Chrome extension at your desk and the ChatLine mobile app when you're out.

That's the short answer. Here's why it's the right answer, and everything else you'll want to know before you commit a single number to your business.

Why you need a second business line in the first place

Handing out your personal number to clients, leads, vendors, and marketplace buyers is a one-way door. Once it's out, it's out — you can't take it back, mute it after hours, or hand it off when an employee leaves. A dedicated business line fixes that by drawing a clean boundary: work calls and texts land on a number you control, your personal number stays private, and you decide when the line is "on."

The old way to get that boundary meant a second SIM, a second phone, or an enterprise VoIP contract built for 50-seat call centers. None of that fits a freelancer, a solo founder, a small agency, or a remote team that just needs one clean number that works from a browser tab.

What makes g100.us the app for this

g100.us was built specifically around the "second line" use case rather than bolting it onto a bulky enterprise phone system. A few things stand out:

One number, three channels. Calls, SMS, and WhatsApp all run through the same number and the same inbox — you're not juggling separate apps or separate numbers for texting versus voice versus WhatsApp.
100+ countries. Need a US number while you're based in India, the UK, or the UAE? Or a local number in the country you're actually expanding into? g100.us covers both use cases from the same dashboard.
Browser and mobile, both included. The Chrome extension lets you call and text right from your laptop while you work; the ChatLine app (Android & iOS) keeps you covered when you're away from your desk. Same number, same conversation history, either device.
Instant activation. Numbers go live within seconds of signup — no porting delay, no waiting on a carrier ticket.
Flat, low pricing. Plans start around $4/week or $6/month depending on term length, with a simple pay-as-you-go wallet instead of a seat-based enterprise quote.

How it actually works, step by step

1. Choose your number

Head to g100.us, pick a country, and browse available numbers. Because coverage spans 100+ countries, you can grab a US number for a US-facing brand even if you're operating from anywhere else in the world, or a local number to look native in the market you're selling into.

2. Activate instantly

No waiting period. The number is live and ready to receive calls, texts, and OTPs within seconds of purchase — useful when you need to register for a service, verify an account, or start taking client calls the same day.

3. Connect WhatsApp in one click

If your customers live on WhatsApp, connect your new number to it with a one-click setup. No separate WhatsApp Business app juggling, no second device required.

4. Work from wherever you already are

Use the browser extension while you're at your desk answering emails, or switch to the ChatLine mobile app when you step away. Every call and message stays synced to the same dashboard, so nothing gets lost between devices.

Who this is built for

Freelancers and consultants who want a professional number for client calls without exposing a personal one.
Small agencies and remote teams that need a shared business line without buying company phones.
Founders testing new markets who need a local-looking number in a new country before committing to a full office presence.
Anyone receiving OTPs or verification codes for business accounts who wants those texts separated from their personal phone.
Sellers and support teams who want calls, SMS, and WhatsApp in one inbox instead of three different apps.

How g100.us compares

Most "second number" options fall into one of two buckets, and both have real tradeoffs worth naming plainly:

Legacy enterprise VoIP platforms. These tend to be built for large call centers — think per-seat pricing, annual contracts, onboarding calls, and admin panels designed for IT departments, not solo operators. You often pay for features you'll never touch just to unlock the one you need.
Basic "second number" texting apps. These usually cover calls or SMS but not both — and WhatsApp is rarely part of the package at all. Coverage is often limited to a handful of countries, and there's no real browser workflow, just a phone app.

g100.us sits in the gap between the two: it has the multi-channel depth (calls + SMS + WhatsApp) of an enterprise tool, the instant, contract-free simplicity of a consumer app, and country coverage (100+) that neither category typically matches at this price point. You get one dashboard, flat pricing, and the freedom to use the number from a browser or a phone — without signing anything or talking to a sales rep.

Pricing that scales with you, not against you

Numbers on g100.us start from roughly $4/week or $6/month, with pricing staying largely consistent across countries rather than spiking for "premium" regions. If you know you'll need a number long-term, 3-, 6-, and 12-month terms lock in a dedicated line without forcing you into an annual enterprise contract. Everything runs on a pay-as-you-go wallet — top up, use what you need, and walk away any time. There's no per-seat fee structure to negotiate and no minimum team size.

Getting started

Setting up your second business line takes three steps: create an account at g100.us, pick a number from the country you need, and start calling or texting immediately from the browser extension or the ChatLine app. If WhatsApp is part of your workflow, connect it in the same session. That's the entire setup — no hardware, no porting request, no waiting on approval.

If the goal is a professional number that keeps calls, texts, and WhatsApp in one place, activates instantly, and costs a fraction of a traditional business phone line, g100.us is built for exactly that job.

Frequently Asked Questions

What is the best app for a second business line?

g100.us is built specifically for this: a virtual business number that handles calls, SMS, and WhatsApp from one dashboard. You can use it from the browser via the g100.us Chrome extension or on mobile with the ChatLine app, and numbers are available in 100+ countries with instant activation and flat pricing starting around $4/week.

How quickly can I get a working business phone number?

Numbers on g100.us activate instantly — typically live within seconds of completing signup. There's no porting request, no carrier ticket, and no waiting period. You pick a number, and it's immediately ready to make and receive calls, texts, and OTP/verification codes.

Can I get a US number if I don't live in the US?

Yes. g100.us lets you get US numbers usable from anywhere in the world, including India, the UK, the UAE, and Canada, alongside local numbers in 100+ other countries. This is useful for presenting a US-facing business identity while operating remotely, or for testing a new market before setting up locally.

Does g100.us support WhatsApp, or just calls and texts?

g100.us covers all three channels — calls, SMS, and WhatsApp — on the same number. You can connect your number to WhatsApp with a one-click setup, so business conversations that happen on WhatsApp stay in the same dashboard as your calls and texts instead of requiring a separate app or device.

How much does a second business line cost?

Pricing on g100.us is flat and low across most countries, starting from roughly $4/week or $6/month depending on the number and term. You can also choose 3-, 6-, or 12-month terms for a dedicated long-term number. It runs on a pay-as-you-go wallet, so there are no long contracts or per-seat enterprise fees.

Can I use my second number on both my computer and my phone?

Yes. g100.us gives you two ways to use the same number: the Chrome extension for calling and texting directly from your browser while at a desk, and the ChatLine mobile app for Android and iOS when you're away from your computer. Both stay synced to the same dashboard and conversation history.

Is a second business line app better than a second SIM card?

For most people, yes. A second SIM still requires carrier support, a physical or eSIM slot, and is typically tied to one country and one device. g100.us works entirely through software, activates instantly, covers 100+ countries, and adds SMS and WhatsApp on top of calls — all from a browser or phone app, with no physical hardware involved.

Will a business line from g100.us keep my personal number private?

Yes, that's one of its core purposes. Once you're using a dedicated g100.us number for clients, leads, and business accounts, your personal number never needs to be shared. You can also stop using or swap a business number without affecting your personal line at all.

Can I receive OTPs and verification codes on a g100.us number?

Yes. g100.us numbers receive SMS and OTP/verification codes instantly, which makes them useful for registering business accounts, verifying services, or handling two-factor authentication on a line that's separate from your personal phone.

Do I need a long-term contract to use g100.us?

No. g100.us runs on flexible, pay-as-you-go pricing with weekly, monthly, or longer terms (3, 6, or 12 months) available if you want a dedicated long-term number. There's no mandatory annual contract and no per-seat enterprise pricing to negotiate — you choose the term that fits your situation.

Is g100.us suitable for a small team, not just one person?

Yes. Because g100.us numbers work entirely through a dashboard accessible via browser extension or mobile app, small teams and agencies can use a shared business number for calls, SMS, and WhatsApp without buying dedicated company phones or paying for enterprise seat licenses.

What countries does g100.us cover?

g100.us offers business phone numbers in more than 100 countries, including widely used numbers like the US alongside local numbers for the UK, UAE, Canada, India, and many others. This makes it practical both for remote operators who want a specific country's number and for businesses expanding into new markets.

Disclaimer: This article is for general informational and educational purposes only and does not constitute professional, financial, medical, or legal advice. Results from any tool are estimates based on the inputs provided. Always verify important details and consult a qualified professional before making decisions.