(WXYZ) - A Best Buy program allowing you to trade in old iPhone's for the new iPhone 5 is coming back.
The promotion begins this Friday and runs for the following 9 days.
The deal is, if you have a working iPhone 4 or iPhone 4S model you can trade it in to get a free iPhone 5 in return.
If Best Buy deems your older phone worth more than the $149.99 price of an iPhone 5, it'll make up the difference with a Best Buy gift card.
To qualify you must be eligible for a phone upgrade with your wireless carrier.
The deal also requires you to get a new two-year data plan.
Best Buy says it had its biggest day ever for its trade-in program June 1 -- when they first launched the deal.