Virtual Number vs Second SIM vs eSIM: Which Fits You?
A second physical SIM or an eSIM gives you a full mobile line with data on your phone, but it needs a compatible device and usually carrier registration. An online rented mobile number, like the real mobile numbers SMS Hallo offers in 181 countries, works in a browser with no SIM slot or ID documents and is best for receiving codes, calls and texts privately. Many people combine them: a SIM or eSIM for data and daily calls, and an online number for sign-ups and privacy.
Three ways to get a second phone number
There are three common ways to add a second number: rent a mobile number online, put a second physical SIM card in a phone, or add an eSIM plan. Each one solves a slightly different problem, so the right choice depends on what you need the number for.
Searches for a virtual number usually come from people who want a second number without a second phone. That term covers many products, from internet calling apps to forwarding services. SMS Hallo works differently from most of them: it rents real mobile numbers in each country's local mobile format, and messages and calls arrive in an online dashboard instead of on a SIM card.
A second physical SIM is the traditional option. You buy a SIM from a carrier, insert it into a dual-SIM phone or a spare handset, and get a full mobile line with calls, texts and usually data.
An eSIM is the same kind of carrier plan delivered digitally. Apple describes eSIM as an industry-standard digital SIM built into the phone, which removes the need for a physical card. You install a profile by scanning a code or through the carrier's app, and the phone treats it like a SIM.
Side-by-side: how the three options compare
Cost model. An online number from SMS Hallo is a flat rental starting from $1.80/month on the 12-month plan ($21.60 billed yearly), the same in every country, with no setup fees. A second SIM or an eSIM is priced by the carrier, usually as a prepaid top-up or a monthly plan that bundles data, minutes and texts, and prices vary widely by country and carrier.
Needs a phone or SIM slot. An online number needs no SIM slot and no second phone; you use it in a web browser on a phone, tablet or laptop. A second physical SIM needs a dual-SIM phone or a spare device. An eSIM needs a phone that supports eSIM, and Apple notes that to use two carriers at once your iPhone must be unlocked, or both plans must come from the same carrier.
ID and registration. SMS Hallo sign-up takes an email and a password, with no SIM card, no ID documents and no local address. Many countries require mobile SIM and eSIM users to register with an ID document, and the rules differ from place to place; our guide to SIM registration laws by country explains how this varies.
Works abroad. An online number works anywhere you have an internet connection, and it stays the same when you cross borders. A home SIM or eSIM abroad depends on your carrier's roaming terms, while a local SIM or eSIM bought abroad gives you cheap local data but a new number in each country.
Receive SMS and calls. Every SMS Hallo number includes unlimited incoming SMS and unlimited incoming calls, shown in the dashboard with codes detected for one-tap copy. A SIM or eSIM receives texts and calls on the phone itself, as long as the line is active and the phone has signal or Wi-Fi calling.
Outbound. SMS Hallo includes 500 outgoing SMS per month and 1,000 outgoing calling minutes per month, used through the dashboard and its browser dialer; allowances reset every 30 days and unused allowance does not roll over. A SIM or eSIM plan includes whatever outgoing minutes, texts and data the carrier bundles, and is the better choice if you need mobile data.
Keeping it long term. You keep an SMS Hallo number by renewing for 1, 3, 6 or 12 months at a time or turning on auto-renew; after expiry the number may be given to someone else. Prepaid SIMs and eSIMs also have expiry rules, often tied to top-ups or activity, so check your carrier's terms if a number is linked to important accounts.
When a rented online number makes sense
An online number is the simplest choice when you mainly need to receive codes, messages and calls on a number you do not want to share. It suits people who do not want to carry a second phone, whose phone has no free SIM slot, or who want a number in another country without traveling there.
Typical uses include keeping a personal number out of marketplace listings, setting up a second WhatsApp or Telegram account, dating apps, freelance and small business contact, and signing up for services that need a reachable number. SMS Hallo numbers work with WhatsApp, Telegram, Instagram, Google, TikTok and most apps and sites that verify by SMS or call, although no provider can promise that every app will always accept every number.
Because inboxes are private, only you see the messages while you rent the number. That is a major difference from free public receive-SMS sites, where anyone can read the codes.
Payment is in USDT or USDC stablecoins on Tron, BNB Chain, Polygon, Base or Solana, either from a prepaid wallet or directly for a number. If that does not suit you, a carrier SIM or eSIM paid by card may be easier.
When a second SIM or an eSIM is the better choice
A carrier SIM or eSIM is better when you need mobile data, when you make a lot of calls on the move, or when you want the number to behave exactly like a normal phone line on your handset.
It is also the right choice for accounts that are meant to be tied to your legal identity, such as banks, payment apps and government services. Those providers often only accept a number registered in your name, and SMS Hallo must not be used to get past identity (KYC) or security checks.
For travel, a local eSIM is often the cheapest way to get data in a new country. Many travelers use a local data eSIM for internet access and keep an online number for codes and contacts that should not change from trip to trip.
The trade-offs are the hardware requirements, registration in many countries, and the fact that a cheap prepaid line can lapse if you forget to top it up. If a lapsed number is reassigned, the accounts linked to it can become hard to recover.
Using them together
These options are not mutually exclusive, and the most practical setup for many people is a mix. A common pattern looks like this.
1. Keep your main SIM or eSIM for your bank, government services and close contacts.
2. Add a local data eSIM when you travel, so you have internet access without roaming charges.
3. Use an online number for sign-ups, marketplaces, messaging accounts you want to keep separate, and anywhere you would rather not share your personal number.
4. Renew or auto-renew any number that important accounts depend on, whichever type it is.
This split keeps each number doing the job it is good at, and it avoids the most common problem: an important account tied to a short-lived number.
Guarantees and trying an online number safely
If you want to test whether an online number fits your use, the SMS Hallo guarantees reduce the risk. You get a 7-day free replacement: swap for another available number in the same country, free, up to 3 times, and the new number keeps the plan and expiry date.
If the number doesn't work with the app it was rented for, for example the code never arrives, you can request within 7 days and get a 100% refund of what you paid. There is also a 7-day money-back guarantee: a full refund within 7 days, no questions asked, if no call or SMS has been made or received on the number.
Carrier SIMs and eSIMs have their own return and cancellation terms, which vary by carrier and country, so read them before you buy a plan for a single use.
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Frequently asked questions
Is an online number the same as an eSIM?
No. An eSIM is a digital version of a carrier SIM that lives inside your phone and gives you a full mobile line, usually with data. An online number like SMS Hallo is rented on a website and used in a browser, with no SIM or eSIM involved. It is designed for receiving codes, texts and calls and for limited outgoing use, not for mobile data.
Do I need a dual-SIM phone for a second number?
Only for a second physical SIM or for running two eSIM or SIM lines at once. An online number from SMS Hallo needs no SIM slot, so it works on any phone, tablet or computer with a browser and an internet connection. That makes it a common choice when your phone has a single SIM or is locked to one carrier.
Which option needs ID documents?
It depends on the country. Many countries require SIM and eSIM users to register with an ID document, and the rules vary, so check our guide to SIM registration laws by country. SMS Hallo sign-up takes an email and a password, with no ID documents, no SIM card and no local address, but it must not be used to get past identity or security checks.
Which is best for receiving verification codes?
For everyday sign-ups, an online number is convenient because codes are detected in the dashboard and can be copied with one tap. For banks, payment apps and government services, keep using the number registered in your name, because those providers often only accept that number. No provider can promise that every app accepts every number, which is why SMS Hallo offers refund and replacement guarantees.
Which is cheapest?
It depends on what you need. SMS Hallo starts from $1.80/month on the 12-month plan ($21.60 billed yearly), the same in every country, with no setup fees. Carrier SIM and eSIM prices vary by country, carrier and bundle, and they include mobile data, which an online number does not. Compare against what you will actually use.
Can I make calls and send texts from an online number?
Yes. Every SMS Hallo number includes 500 outgoing SMS and 1,000 outgoing calling minutes per month, used from the dashboard and browser dialer, plus unlimited incoming SMS and calls. Allowances reset every 30 days and unused allowance does not roll over. If you make many calls on the move or need data, a SIM or eSIM plan may suit you better.
Which option is better for travel?
Many travelers combine them. A local eSIM is often the simplest way to get affordable data in a new country, while an online number stays the same in every country and works over any internet connection. Keep your home SIM active if your bank relies on it, and check your carrier's roaming terms before you go.
Related
- guides/sim-registration-laws-by-country
- guides/what-is-a-non-voip-number
- guides/virtual-number-for-digital-nomads
- guides/keep-your-phone-number-long-term
- features/non-voip-numbers
- pricing
- virtual-number
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Last updated 2026-10-01 · SMS Hallo