Apple has begun allowing people who bought iPhones before the higher-end model’s price was abruptly slashed to apply for a $100 store credit. The company said the credit would be available for people who bought either the $599 8GB, iPhone or the $499, 4GB model before August 22. People who bought the phones more recently are eligible for refunds.

Those early buyers must fill out a form on Apple’s Web site to have the retail or online store credit delivered to them electronically.