Log::info('SMSG: Request for sending message returned: '.$output.' (Probably a request ID).');
But there is little problem with this. If proper permissions are not set on storage directory, your request will be sent to the server but Log will not be written to log file due to permissions and SMS is not sent/delivered. I can provide steps to reproduce it.
Steps to reproduce
Change permission of storage directory so application can't write log to log file.
Hit request to send SMS
You may get request id on screen but SMS will not be sent.
This error occurs when proper permissions are not set. Cases when developers use CI/CD or devops and which rarely use logs. I spend whole day to solve this issue by step by step debugging.
Hope you will address this issue. Also it will be useful for future users too.