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McDonald’s: Buy 1 Get 1 FREE Filet-O-Fish (Mobile App)

Use the McDonald’s App to score an offer valid for a Buy 1 Get 1 FREE McDonald’s Filet-O-Fish Sandwich! You’ll have to use mobile order and pay. Just click on the “View Deals” section of the app to find this offer, customize your order, and apply the coupon and pay. This deal is valid once per week through March 4th.

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