i don't get the sms with the confirmation code

Check here to be sure you live in a support country for sms verification: http://support.apple.com/kb/HT6020.

Assuming your phone can receive sms messages, I'm not sure what the problem is. You may need to contact Apple support for assistance: http://support.apple.com/kb/HE57.

For what it's worth, these are Apple's troubleshooting steps for your issue (from http://support.apple.com/kb/TS4644):

• Make sure that you have a good cellular network connection on your phone.
• Check that your phone number is one that can receive SMS messages. You can do this by having someone send you a text message.
• Check that you have the correct phone number associated with your account:
  • Devices using iOS 7.0.3 or later: Tap Settings > iCloud > Account, then tap Keychain. Check that the phone number listed under Verification Number is correct. If not, enter another phone number.
  • Macs using OS X Mavericks v10.9 or later: Choose Apple () menu > System Preferences. Click iCloud, then click Account Details. Check that the phone number listed under Verification number is correct. If not, enter another phone number.
• Check Apple System Status to see if there is currently a service outage affecting iCloud Keychain.
• If you do not have access to a device that has iCloud Keychain enabled, you can contact Apple Support and verify your identity for help completing iCloud Keychain setup.