Unable to send any text messages

[Ishu06]

Hi, I m facing some issue in sending sms. I m having Samsung M31. I only have 1 Sim. I just reset my phone. Before the factory reset I was able to send messages.

* I can make calls, access internet, receive messages but I can't send messages. 

* I have active plan with 100 sms free from airtel. 

* I have completely updated my software, I restarted my phone, did clear catch, clear data still message can't be sent. 

* Did reset network settings too

* Due to this I cannot use any online payment services. What should I do can anyone help ? 

* I tried goggling and found that you should set message center number but it is not set in my mobile. 

* If I set the number available online, it says "Unable to save center address" & not accepting the number and remains not set. What else can I do ? 

*;Smsc setting is available only in google messages but it is disabled and states "Not available"

[cs_member10]

Dear Samsung Member,

Greetings from Samsung Customer Support!

As per your query, we would request you to kindly perform the following steps to resolve your issue.

Check the message center number: Messages>More (Three dots)> Settings>More settings> Text messages>Message Center>Message center number and Tap on OK.

(Check your network operator's website for their message center number to compare). If the number on your phone is different, or missing, tap Message center, enter your network operator's message center number and then tap SET. Then try sending a text message.

Clear the messaging app's data: Settings> Apps> Messages> Storage> Clear data>Clear cache> Restart.>Try sending a text message.
Note: kindly contact your network service provider once to make sure there is no issue from their end.

Update the software if available: https://www.samsung.com/in/support/mobile-devices/samsung-galaxy-smartphone-how-to-update-software/

You can reset your device by following the steps from the below link.
https://www.samsung.com/in/support/mobile-devices/samsung-galaxy-mobile-how-to-perform-a-factory-res...

In case the issue still occurs, please visit the service center for a physical inspection of your device. You can locate your nearest service center with this given link: https://www.samsung.com/in/support/service-center/

Warm Regards,
Samsung Customer Support