WeChat is the hardest mainstream service to register from outside China, and we'd rather tell you honestly than sell you a number twice. The SMS part works: take a number on Get-SMS — Chinese or most other pools — and you'll receive WeChat's verification code normally. But for several years Tencent has added a second gate for new accounts: confirmation by an existing WeChat user, who scans a QR code and must themselves meet criteria (account older than several months, active, not helping others too often).
So the realistic checklist for a new WeChat account is: a clean device without previous WeChat installs, a stable non-VPN IP, a virtual number for the SMS step — and a friend with an established WeChat account ready to confirm you. With those four things, registration goes through; without a helper, it usually stalls at the QR step no matter whose SIM card you use, physical or virtual.
Besides first registration, our numbers are useful for the flows WeChat handles by SMS alone: confirming a login on a new device for an existing account, unbinding an old number, or re-verifying after the app flags a session. For those, a one-time activation is exactly enough. If you're setting up WeChat for business communication with Chinese partners, do the registration once with helper confirmation, then bind your own email and keep sessions alive — WeChat rarely re-asks for SMS on stable devices.