How to solve "SIM card activation failed, and sending activation SMS to gateway failed"?

Sim card activation failure may be a system problem, and the system needs to be updated.

The failure to send an activation message to the gateway may also be due to the following reasons: Web link.

1. is blocked by operators. You complain to the operator that this notification message is spam, which leads to the message being blocked by the operator-you need to contact the operator to solve this problem.

2. Mobile phone blacklist settings. You have set strict interception rules in SMS. Check the SMS blacklist settings.

3. Browser Privacy Settings The security level of the browser is too high or the setting to block "third-party cookies and website data" is set-reset the security level of the browser or turn off the setting to block third-party cookies.

4. SMS sending exceeds the one-day limit. In order to avoid short message bombing and waste of resources, each Xiaomi account sends up to ten short messages every day, and each mobile phone number sends up to ten short messages every day. Unable to log in to the service that needs to verify the mobile phone on the same day.

5. Network Delay Due to network or geographical problems, the authentication information sent by the server may be delayed. Wait patiently or count down and try again.