OnlineSIM alternative: a real mobile number with calls included
OnlineSIM offers two kinds of numbers for receiving SMS: short-term numbers for a single service and rental numbers you can extend, in 110+ countries. If you want a number that also takes calls and lets you send SMS, at one flat price in 181 countries, SMS Hallo rents real mobile numbers you keep for as long as you renew.
What OnlineSIM is
OnlineSIM is a service for receiving SMS on numbers you order online, and its site says it has operated since 2013. Its legal pages name ONLINE CONNECTION TECH PTE. LTD., a Singapore company, as the provider, and describe the service as a marketplace that gives access to SMS reading on numbers supplied by third-party providers.
The homepage shows two tariffs. The one-time "15-minute number" receives unlimited SMS from one service for a short period; its FAQ says the exact time runs from 10 minutes to 1 hour depending on the country. The rental option receives SMS from any service, can be extended at any time and is described as ideal for long-term use.
OnlineSIM says it covers 110+ countries, offers some free numbers and provides API documentation.
OnlineSIM pricing, payment, identity and refunds
Prices are shown after you select a country. Its terms say you prepay by bank transfer or by electronic or digital asset payment methods available on the site, and the prepaid amount appears as credit on your account.
On identity, its terms say that client identification may be required at any time, before or after a purchase, to prevent fraud or meet legal, payment or supplier requirements, and that an account may be suspended if you do not complete it.
On refunds, the homepage FAQ says that if a message does not arrive on a short-term number you can close it and order another without being charged. Its refund policy says refunds are not automatic and are reviewed case by case after an email request, and that, as far as the law allows, no refunds are given for outcomes such as non-delivery or a number not being accepted. Its pages do not mention sending SMS or making calls.
How SMS Hallo differs
SMS Hallo numbers are two-way. Besides unlimited incoming SMS, every number takes incoming calls and includes 500 outgoing SMS and 1,000 outgoing minutes per month from the browser dashboard.
The price is the same flat monthly rate in all 181 countries, sign-up never asks for ID documents, and the three guarantees include a 100% refund if the number doesn't work with the app you rented it for, requested within 7 days.
When OnlineSIM may suit you better
If you need a code once and do not care about keeping the number, OnlineSIM's short-term number is built for that and will usually cost less than a monthly plan.
It may also suit you if you prefer to pay by bank transfer or other methods it offers, or if you need its API for automated testing.
Why people choose a rented number
A rented number is one you keep. SMS Hallo rents real mobile numbers (non-VoIP, in each country's local mobile format) in 181 countries, and a number stays yours for as long as you renew it, 1, 3, 6 or 12 months at a time, or automatically with auto-renew.
That matters because many apps ask for a code again later: when you sign in on a new phone, reset a password or confirm a change to your account. If you still hold the number, the new code lands in the same private inbox. After a rental ends, a number may be given to someone else, so keep renewing any number linked to an account you care about.
Every number includes unlimited incoming SMS, unlimited incoming calls, 500 outgoing SMS and 1,000 outgoing calling minutes per month, used from the browser dashboard with its SMS inbox, send-SMS screen, dialer and call log. Allowances reset every 30 days, and unused allowance does not roll over.
The price is the same in every country: from $1.80 per month on the 12-month plan ($21.60 billed yearly), with no setup fees. Prices for 1-, 3- and 6-month plans are shown when you choose a number. You pay in USDT or USDC on Tron, BNB Chain, Polygon, Base or Solana, either from a prepaid wallet (minimum top-up $5) or directly for a number.
Sign-up needs only an email and a password: no SIM card, no ID documents and no local address. While you rent a number, only you can see its messages, and SMS Hallo never publishes inboxes.
The three SMS Hallo guarantees
Every SMS Hallo rental comes with three guarantees, which you can use from buttons in the dashboard.
7-day free replacement: within 7 days you can swap the number for another available number in the same country, free, up to 3 times. The new number keeps your plan and expiry date.
Works, or 100% refund: if the number doesn't work with the app you rented it for, for example the code never arrives, request a refund within 7 days and get back 100% of what you paid.
7-day money-back: if no call or SMS has been made or received on the number, you can get a full refund within 7 days, no questions asked.
Using a second number responsibly
SMS Hallo is meant for privacy and for keeping a second number for legitimate sign-ups, such as separating work and personal accounts or not handing your main number to every website.
Its Acceptable Use Policy forbids fraud, creating fake or bulk accounts, breaking an app's terms, coming back to an app after being banned, and using a number to get through bank or identity (KYC) checks that are meant for you personally. Each app decides which numbers it accepts, so no provider can promise that a particular app will take a number. If an SMS Hallo number doesn't work with the app you rented it for, the guarantees above cover you.
How to get started with SMS Hallo
1. Create an SMS Hallo account with your email and a password.
2. Choose the country you need, pick a number and choose a 1-, 3-, 6- or 12-month plan. Prices for shorter plans are shown when you choose a number.
3. Pay in USDT or USDC, either from a prepaid wallet (minimum top-up $5) or directly for the number. The payment window shows the exact amount, the address or QR code and a 10-minute countdown; send the exact amount on the same network.
4. Enter the number in the app you want to verify and read the code in your SMS Hallo inbox, where codes are detected and can be copied with one tap.
5. For accounts you plan to keep, turn on auto-renew so the number stays yours.
| SMS Hallo | OnlineSIM | |
|---|---|---|
| Type | Rented real mobile number (non-VoIP), 1 to 12 months, renewable | Short-term numbers for one service (10 minutes to 1 hour) and extendable rentals |
| Price model | From $1.80/month on the 12-month plan ($21.60 billed yearly), same in every country | Prepaid balance; prices shown per country |
| Payment | USDT or USDC on Tron, BNB Chain, Polygon, Base or Solana | Bank transfer and electronic or digital asset methods |
| Identity checks | Email and password only; no SIM card, ID documents or local address | Client identification may be required at any time, per its terms |
| Countries | 181 countries | 110+ countries |
| Refunds | 7-day free replacement, 100% refund if it doesn't work with the app, 7-day money-back | Case-by-case review on request; short-term numbers can be closed without charge if no SMS arrives |
| Outbound SMS & calls | 500 SMS and 1,000 minutes per month included | Not stated |
Frequently asked questions
Does OnlineSIM rent numbers long term?
Yes, its homepage lists a rental option that can be extended at any time, alongside short-term numbers for one service.
Does OnlineSIM ask for ID?
Its terms say client identification may be required at any time. SMS Hallo asks only for an email and a password.
Are SMS Hallo numbers VoIP?
No. SMS Hallo rents real mobile numbers in each country's local mobile format, not VoIP lines.
How long can I keep an SMS Hallo number?
As long as you keep renewing it, 1, 3, 6 or 12 months at a time, or with auto-renew turned on. After a rental ends, the number may be given to someone else.
What if an SMS Hallo number doesn't work for my app?
Request a 100% refund within 7 days, or swap it free for another number in the same country up to 3 times. Apps decide which numbers they accept, which is why these guarantees exist.
Sources
Competitor facts verified on 2026-10-01.