My mobole don't send Messages

[ESHETU]

Dear let you help me my Samsung S10 plus do noy send messages 

[xSteveuk]

Hi,
If won't send text messages, try restarting phone or checking for updates. Check if you've been blocked by the recipient, or if your carrier is having network issues and that your network hasn't blocked messages. You can also try clearing the messages cache or making sure your SIM card is installed properly.

[JAMES4578]

Hi @ESHETU  certainly check if there are any issues with Network. I take it it is not just one  contact you are having an issue with.  You may need to reinsert the sim or try in another device if that is possible  before doing so.   A few other ideas that have not been mentioned.

Toggle Airplane Mode On /off to see if that makes a difference.

Reset The Network connections, go to Settings-General Management-Reset-Reset Network Connections.

if the other Trouble  Shooting fails would try wiping the cache partition, this deletes temporary files but keeps your Data intact.

1. Turn off the device.
2. Connect To Computer or plug in USB-C Headphones , Press and hold the Volume Up key and then press and hold the Power key
3. When the Android logo displays, release all three keys.
4. Wait until the Android system recovery menu options appear.
5. Press the Volume down key several times to highlight wipe cache partition.
6. Press Power key to select.
7. Press the Volume down key to highlight yes, them and press the Power key to select.
8. When the wipe cache partition is complete, Reboot system now is highlighted.
9. Press the Power key to restart the device.

[Pugs1957]

You should check you are using the correct APN settings for your carrier.