YunDuanXin is a free public board of phone numbers, and today the service is broken. The working catalogue covers only the United States and the Netherlands, and every inbox we opened on 2026-08-11 was frozen on messages from around February 2026. A code sent to any listed number today has nowhere to appear. Overall rating: 2.5/5.
There is nothing to pay on YunDuanXin: every phone number is free and shared. The board is public, so the SMS sent to a listing is readable by anyone who opens the same page. On top of that, the current catalogue has not received any new SMS for roughly six months, so there are no fresh verification codes to read in the first place.
Free, public numbers are shared with everyone: codes can be read by other people and the same number is often already registered on popular apps. For accounts you intend to keep, a private number is the safer choice.
The service interface is a plain public board. Each listing sits on its own page with a running feed of SMS below it, and refreshing the page is how you check for anything new. There is no login screen, no queue and no filters.
The YunDuanXin country menu lists the United States, France, the United Kingdom, China, Spain and Sweden, but only the United States is stocked from the menu. The French, Chinese, Spanish and Swedish pages carry no phone numbers, and the 'all countries' page is empty as well. The front page adds ten Dutch phone numbers, even though the Netherlands is missing from the menu itself. In practice the working catalogue is two countries: the US and the Netherlands.
The service is free with no registration and no payment. There is no account to create, no card to attach and no wallet to top up. You land on the site, pick a line from the list and read its public inbox. The only contact route is a web form; there is no email, no chat and no listed support hours.
We loaded YunDuanXin on 2026-08-11, walked the country menu one page at a time, opened every listed phone number and read the timestamps on the newest SMS in each inbox. We also read the site's own policy pages, searched Google Play and the App Store for a YunDuanXin app (none found) and looked for a public review sites profile (none found). No paid activation runs were needed. The failure was visible on the free public board itself.
| Metric | 7sim | YunDuanXin |
|---|---|---|
| Newest message on the board | Minutes old | About six months old on every American number we opened |
| Numbers live | 432 | 24 on the front page, 14 American and 10 Dutch |
| Countries in the menu that actually have numbers | 104 of 104 | 1 of 6, with France, China, Spain and Sweden all empty |
| Ads on the page | None | Google AdSense on every page |
| Message retention promised | Not applicable | Under 24 hours, while half-year-old messages are still on display |
7sim is our own free service and the best free pick in our list, so we use it as the reference column. The numbers come from our own hands-on testing above; free numbers come and go, so your results may vary.
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We opened eight American numbers on 2026-08-11 and the newest message on every single one was about six months old, nothing has arrived on these lines since roughly February 2026.
— SMS ActiveR test team · Live inbox check on yunduanxin.netThe site promises messages are never kept beyond 24 hours, yet the pages still show inboxes from half a year ago; the board is running with ads on it but nobody is topping it up.
— SMS ActiveR test team · Policy pages vs live inboxesYunDuanXin sits at the bottom of our free-service rankings today. The site is still online, still shows Google AdSense and still lists 16 American phone numbers in the country section plus 10 Dutch phone numbers on the front page. But every inbox we checked had its newest SMS from about six months ago, so a verification code sent to any of these lines now has nowhere to land. Until the operators start topping the board up again, YunDuanXin is not a working option for verification codes.
YunDuanXin is a free web service that publishes shared phone numbers and shows the incoming SMS to anyone on the page. There is no account, no payment and no app. You open the site, pick a phone number and read the public inbox. On paper the service covers popular online services such as Facebook, Telegram, WeChat, VK, PayPal and AliPay across the United States, France, the United Kingdom, China, Spain and Sweden.
Yes, every phone number on the site is free and public, with no registration and no payment. The inbox for each listing is visible to anyone on the page.
No. There is no API to integrate with, and there is no YunDuanXin app on Google Play or the App Store; the service only works through the website.
The menu lists six (United States, France, United Kingdom, China, Spain, Sweden), but only the United States is stocked from the menu. The front page also carries ten Dutch lines, though the Netherlands is not in the menu at all.
No. Every message sent to a listed line is public, so anyone opening the page can read your verification codes and can potentially reset or take over the account.
No. On 2026-08-11 the newest message on every American listing we opened was around six months old, and nothing has arrived on any line on YunDuanXin since roughly February 2026.