Thank you for reaching out. Are you using the stock messaging app on your device?
Are you trying to attach large files to your text messages?
Are you using Wi-Fi or data when you are experiencing these symptoms?
Are you receiving any error messages or just the continuous spinning?
I would recommend trying to send the attachments via data to see if you still experience these symptoms?
I would recommend turning off Wi-Fi to send the message with the attachment to see if you still experience these symptoms?
When did you last update your device?
Have you tried wiping the cache partition on your device? The system cache partition stores temporary system data. It's supposed to allow the system to access apps more quickly and efficiently, but sometimes things get cluttered and outdated, so a periodic cache clearing can help make the system run more smoothly. Give these steps a try: