Apple's Beats brand in April unveiled the Powerbeats Pro, a redesigned wire-free version of its popular fitness-oriented Powerbeats earbuds.
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Previously, unverified users were able to reply to existing messages. So, many users may have noticed a recent inability to reply to messages when this change was made.
Activation emails have been resent to those with unverified accounts. Alternatively, you can use this url to request your activation email.
Note: if you change your email address, you must reactivate your account.