Q: problems sending SMS to samsung

Hello SkøyerViggo,

Thanks for using Apple Support Communities.

It sounds like you're having issues with sending SMS.  To troubleshoot the issue, please follow the steps in the information and article below:

If you still can't send or receive SMS, follow these steps

1. Make sure that the contact who's trying to message you isn't blocked in Settings > Messages > Blocked.
2. Make sure that you're using the area code with the contact's phone number. When sending messages internationally, you also need to use the contact's international code.
3. If you're using a "Pay as you go" SMS plan, make sure it has enough available balance. Contact your carrier if you're unsure of your SMS plan or the available balance.
4. If the issue occurs with a specific contact or contacts, back up or forward important messages and delete your current messaging threads with the contact. Create a new message to the contact and try again.
5. If the issue occurs with a specific contact or contacts, delete and recreate the contact from the Contacts app. Send a new message to the contact.
6. Back up and restore your iPhone as new.
7. If your carrier has recently ported your phone number, the porting process might not be complete. Contact your carrier to confirm that the porting process is complete.
8. Contact your carrier to confirm that you're provisioned for sending SMS and are in an area with cellular coverage.
9. Contact your carrier to verify there are no blocks or filters placed on your wireless account preventing you from sending SMS.

 

iOS: Troubleshooting Messages

http://support.apple.com/kb/TS2755

Take care,

Alex H.