If you are grandfathered in to a pay-as-you-go plan (monthly bill), then you won’t have access until:
- you make sufficient paid billings to your card on file to be charged (in the past $1+)
- OpenAI uses that as a qualifying criteria when again adding more gpt-4 users
- OpenAI decides on a different access policy for its long term users.
You might be able to remove all payment methods and cancel payment plan, and then be driven into the prepaid plan with minimum $5 purchase that grants gpt-4, but for now, you would not be able to switch back. Then purchasing non-refundable credits that expire after a year, at a maximum purchase and balance of $50.
A second account allowed on the same number might be what you want to maintain your original billing yet have another account that gets instant gpt-4 with the credit purchase.