Where did online chat go? I'm unable to call or be called, which is the only option ever available.

Hola, @magenta2080023​! I'm sorry to read you were having trouble getting in touch with our chat team, and that you're seeing this error message on your device -- definitely not the best day of the year to be having phone trouble. 😥

If you're logged in to My T-Mobile, you can hit the Contáctanos link at the bottom of the page and the chat option will show at the top. It does go away if the queue is long or during hours the chat team is unavailable, though.

Are you still getting this SIM no válida error? How long have you been having this trouble? Did you recently start service, or just get a new SIM or new device? This particular error message is one we typically need to work with you to resolve by checking your account provisioning or possibly sending a SIM update to your device OTA. If you're not able to message us through chat, we do also offer account support through social media! Our T-Force teams on Twitter or FB have account verification options and can take a look at our side of the account to see what could be causing this error message. How is everything going for you today?

- Marissa