Recently, I went through another round of testing virtual number platforms. I’ve encountered plenty of pitfalls before—some platforms simply don’t receive SMS, others have delays of half a day. In the end, I summarized a few decent ones to share with everyone.

Speaking of virtual numbers, it’s basically a service that rents virtual numbers to receive verification codes. Compared to buying new SIM cards, this is much more convenient for registering on overseas websites and testing interfaces. Among the platforms I’ve used, SMS-Activate and 5SIM perform the most reliably, with verification codes arriving within 10 seconds most of the time, and they cover many countries. They’re especially suitable for cross-border application testing. For domestic users, Super Cloud SMS and XiaoNiao Receive Code are also okay. US numbers usually take 10-30 seconds, while Chinese numbers are faster—sometimes 5-20 seconds. Getsmscode is cheap, but sometimes delays occur on less popular platforms, making it suitable for light users.

There are a few things to watch out for when using virtual number platforms. Shared numbers are often previously registered, and some services will directly flag them as risky numbers. Switching to a different number segment usually solves this. Also, verification code delays can happen, especially during peak times or with less common countries. My experience is to buy multiple numbers at once so that if one becomes invalid, I can switch immediately. Some platforms also support "one-click number switch," which is quite practical and helps avoid waste.

If you’re just testing interfaces, any virtual number platform that supports API is enough. But if you need stable registration on a specific overseas website, it’s better to choose reputable and active providers—don’t just go for the cheapest option. Honestly, virtual numbers are ultimately temporary; privacy and security cannot be guaranteed long-term, so never treat them as your main number.