Thank you for reaching out. Have you reset your network settings? This will reset Bluetooth, Wi-Fi, and Mobile Data. You can do this by going to Settings>General Management>Reset>Reset network settings. I would also recommend checking out this link. https://www.samsung.com/us/support/troubleshooting/TSG01001439/
If these steps are performed to no avail I would recommend reaching out to your carrier for further assistance.
