Apple Music
Why can’t i redeem my 6 month free trial?
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Did you follow the steps mentioned at the bottom go this related Apple page?
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 1 . Make sure your iPhone or iPad is running the latest version of iOS or iPadOS.
 2 . Pair your eligible audio device to your iPhone or iPad.
 3 . Open the Apple Music app on your iPhone or iPad and sign in with your Apple ID. If the offer doesn't appear immediately after launching the app, go to the Listen Now tab where it will appear.
4 . Tap Get 6 months free.
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copied from: Six Month Offer Apple Music
Don't forget, if you did subscribe to Apple Music in the past, you can't redeem this offer.
- Offer is available for new subscribers with an eligible device for a limited time only. Plan automatically renews at your region's price per month until cancelled. No purchase necessary for current owners of eligible devices. Service availability varies by region. Restrictions and other terms apply.
- Not all content is available in Dolby Atmos. Accessing Dolby Atmos features requires Dolby Atmos-capable devices. Playback quality will depend on hardware, audio accessories, and internet connection.