I currently have the same issue - I had to google what that prompt even meant. Seems like a new, accidental issue with recent updates, since I know ppl in my area using ChatGPT with no issue.
I just saw someone post this problem on Facebook this morning. It looks like he is already a ChatGPT user and just got this message for the first time today. It seems that its not just for new users signing up.
Same problem in Colombia (+57). I’ve tried countlees times to sign up in ChatGPT, all attempts failed.
Prompt message: “It looks like this is a premium phone number. Please provide a valid, non-premium phone number to continue.”
I received this error also.
In my case was because I had registered the phone number already.
Check your sms’s app… the messages coming from the bot have the alias " AUTHMSG"
I entered another phone number and it worked fine.
Hope this solve your problem too.
Same problem from Andorra, asking for a non-premium phone number.
It’s happening to people who are trying to register for the first time, using their corporate account.