How to remove other iClouds
How to remove any other iCloud on my phone
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Gabrielaurbina230 Said:
"How to remove other iClouds: How to remove any other iCloud on my phone"
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Is this a Used Device?:
If this is a used device, then the person currently signed in to the iPhone needs to log themselves out of it. Elsewise, it is useless to your account. This is the site the seller should have used, prior to selling it to you: What to do before you sell, give away, or trade in your iPhone, iPad, or iPod touch - Apple Support. The seller should have known better. So, return it, requesting that they log out of it.