Hi, I needed to confirm my phone number at Paypal but the confirmation number they sent never gets to my phone. I'm using the $30 plan, and have no problem sending and receiving text messages from my friends; when I asked the Paypal about the issue, they suggested me to check the mobile carrier if they allow the short code messages. I found some related questions here, and one comment said that AT&T prepaid actually shut down the system for the short code messages some years ago--is that true? If not, can someone let me know how I can receive the short code messages, or premium SMS as someone called? My phone is HTC Desire 610. Thanks!