I am trying to add my cell phone number to my medical provider's website. They send a verification code, but it never arrives. I've been trying to do this for 3 days. I am a long time Verizon wireless customer. I get other texts and verification codes - no problem. The technical support at the medical provider website says they can see where their system sent the code, but I'm not recieving it. I've tried to add my cell phone number on my iPad, iPhone and laptop. Nothing works. Please help.