Recently, I've been experimenting with various SMS verification platforms again, having encountered many pitfalls before, such as not receiving messages or delays of half a day. Later, I summarized that there are only a few reliable SMS verification platforms.

The ones I use the most are still SMS-Activate and 5SIM, both of which have pretty fast verification speeds, usually arriving in about 10 seconds, and they cover many countries, making them especially suitable for cross-border testing. For domestic applications, Xiaoniao SMS and Super Cloud SMS are good options, with response times between 5-30 seconds, occasionally slower during peak times. Getsmscode is cheap but sometimes delayed, depending on your needs.

When using these SMS verification platforms, be aware that some numbers are shared and prone to risk control, so it's recommended to prepare several backup numbers. Also, don’t treat them as long-term primary numbers, as privacy and security are not guaranteed. To put it simply, they are okay for emergency use, but if you require stability, you should be cautious.