Why did the short message fail to be sent and the error code 127 was displayed?

If you use an OPPO mobile phone, you can refer to the following methods to deal with the situation that you can't send SMS:

1. Cannot send SMS and receive SMS and verification code at the same time;

1, confirm whether the mobile phone card is in arrears, and ensure that the phone bill balance is sufficient;

2. If this happens in some places, it may be related to the signal or network environment. I suggest you leave this area for a distance, restart your mobile phone or switch flight modes to see if the problem can be solved.

3. If this happens everywhere, it is recommended to replace the SIM card and compare it in different time periods. If it is determined that it is a SIM card problem, it is recommended that you contact the operator for handling; If there is something wrong with your mobile phone, I suggest you go to the official service center of OPPO for testing.

2. Cannot send SMS, but can receive SMS and verification code normally:

1. If "Sent" and "Delivered" are displayed at the bottom of the sent SMS, it may be the other party's mobile phone or network problem. You can open the function of "get delivery report" in "information > three points in the upper right corner > settings > advanced settings";

2. I suggest you check whether the telephone information center number is correct and set the path "Open SMS >"; Three points in the upper right corner > Settings > Advanced Settings > Information Center Number ",and the number of SMS center varies with operators and regions. It is recommended to consult the operator to find out the exact number change and then try to send a message. If the center number is incorrect, you need to correct it in the SMS settings, restart or switch the flight mode to search the network again to see if it can return to normal;

3. It is suggested that you check whether the content of the sent SMS contains sensitive characters or information;

If none of the above methods can solve your problem, it is suggested that you back up your mobile phone data, bring your mobile phone invoice, warranty card and mobile phone to the official service center of OPPO for testing, or choose two-way free mail maintenance service and send your mobile phone to the designated service center for processing.