Recently, I've been messing around with virtual numbers again. Honestly, using a number forwarding platform can save a lot of trouble. Previously, to test SMS interfaces for some overseas applications, buying new SIM cards was obviously not practical, so I started looking for number forwarding platforms. I ran into quite a few pitfalls—some numbers didn't receive messages at all, while others took a long time to arrive. Later, I summarized a reliable solution and want to share it with everyone.

Number forwarding platforms are essentially services that rent virtual phone numbers. After registration, you select the country, enter the number into the verification website, and the verification code is displayed directly in the backend. The difference from buying SIM cards is that they charge per use; some also support monthly packages or long-term rentals, depending on your needs. I personally use SMS-Activate and 5SIM most often. These two platforms have very low latency, with codes arriving within about 10 seconds, and they cover many countries, making them especially suitable for cross-border testing.

For domestic applications, SuperCloud SMS and XiaoNiao receive codes conveniently. SuperCloud SMS's US number segments typically get a receipt within 10-30 seconds; Chinese number segments are even faster, usually within 5-20 seconds. Although during peak times it can sometimes slow down to a minute. XiaoNiao is mainly optimized for domestic e-commerce and social apps, with common applications receiving verification codes within 5-15 seconds.

When using number forwarding platforms, keep a few points in mind: some numbers are shared, which can be flagged as risky; verification codes may have delays, especially for less common countries or apps; it's recommended to have multiple numbers ready so you can switch quickly if one becomes invalid. Also, choose reputable, active platforms—don't just go for the cheapest option, as that can lead to issues. Some platforms support "one-click number switching," which is very useful to avoid wasting time.

If you're just testing interfaces, any platform that supports API access is sufficient. But if you need stable registration on a specific overseas site, it's best to prepare backup options in advance. Sometimes, target services block virtual number segments; switching to a different country number or refreshing the page usually solves the problem. Overall, using the right number forwarding platform not only protects your privacy but also makes various tests easier. The key is to find the one that suits you best.