Forum Discussion
The MSISDN is already registered to another IAM user account
El MSISDN ya está registrado en otra cuenta de usuario IAM. I had an old account with mobile. My phone number and email is attached to my old account. I cannot use the Mytmobile app to log into m...
I had the same issue. Was previously with t-mobile and just returned and ported my number. Like the other person who resolved this, I'm not sure exactly how I fixed it.
It looks like one solution is to log out and re-register with another email address.
Otherwise, I somehow fixed it by logging into my old account with my email address, went to the community, then followed various "my account" links throughout the website until eventually I got to a different screen that said I could manage multiple t-mobile accounts under one user ID. I apologize for not remembering the exact steps, but there is a way to do it. Hope that helps.
