Why can't I always get the verification code?

1, the user's mobile phone number is blocked by the operator.

Such notification messages were complained by operators as spam messages, which led to being blocked by operators.

Solution: You need to contact the operator to solve this problem.

2. Blacklist settings such as SMS security software

In the past, stricter interception rules were set in mobile phone short messages.

Solution: Check the SMS blacklist settings, and check whether there are numbers that are not allowed to reach SMS in the interception mode and black and white list respectively.

3, mobile phone internal browser privacy settings

The security level of the browser is too high or the setting to block "third-party Cookie and website data" is set.

Solution: Reset the browser security level or turn off the browser's "Block third-party Cookie" setting.

The number of short messages sent exceeds the maximum limit of one day.

In order to avoid short message bombing and waste of resources, some mobile phones set up a maximum of ten short messages per mobile phone number every day.

Solution: Cancel the maximum number of SMS messages per day.

5. The signal network in the area where the mobile phone is located is not good, and the communication is delayed.

Due to network or geographical problems, the authentication information sent by the server may be delayed.

Solution: Try a different environment.

Extended data:

Common troubleshooting of mobile phones:

Fault phenomenon: the mobile phone card suddenly stops.

Mobile communication is through the transceiver of the network base station, and then communicates with the called party. If the mobile phone shows no service, it may be related to the following situations:

1. The contact between the SIM card of the mobile phone and the elastic sheet of the mobile phone card slot is poor, resulting in the circuit of the SIM card not working, and the mobile phone cannot communicate with the network base station. At this time, you can take out the SIM card, wipe the gold finger of the SIM card with clean cotton cloth and reinstall it.

2. The system software turns off the modem in the signal processing circuit of the mobile phone because the installed application software is incompatible with the system. At this time, the phone can be turned off and restarted, and the modem in the signal circuit of the phone will be restarted. After the signal is normal, the suspicious mobile phone application software installed before the problem occurs will be deleted.

3. The SIM card of the mobile phone is not registered in the network. At this time, you can insert this SIM card into another mobile phone. If it also shows that there is no service, it is the reason for the SIM card.

4. Due to unexpected reasons, the mobile phone SIM card failed to reconnect to the search network after there was no signal in the network signal coverage area. At this time, you can manually search for network registration again under the menu of Settings-General-Network-Network Operator.

5. The reason why the signal coverage of the mobile phone SIM card network operator is not enough, at this time, you can change the location to an empty area and then check the display of the mobile phone signal grid. If the display is normal after changing the location, you can call the service phone of the network operator for feedback and complaints.

6. The calling card has been used for too long. With valid documents, you can reissue a card in the local business hall.