Once you resolve this error, follow these best practices to avoid a recurrence:
Some Android manufacturers (Xiaomi, Huawei, Oppo) aggressively kill WeChat’s background network activity. wechat login error 5 13
This is rare but happens if WeChat’s servers have globally flagged your account due to suspicious activity (e.g., a third-party plugin detected). In this case, only email support can help. Once you resolve this error, follow these best
Modern mobile OS versions have strict privacy controls that can block WeChat's ability to send or receive the necessary SMS verification. Permissions Once you resolve this error