It's Activation lock and also apple id locked security, tried with iforgot. apple.com and can't reset with questions security, there is anyway for FMI OFF it's iPhone 6s with Box iCloud Clean :
Guide] How to Unlock iPhone Free with IMEI Number - iMobie
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Newest] How to Unlock the iPhone Free with the IMEI Number
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Newest] How to Unlock the iPhone Free with the IMEI Number
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Newest] How to Unlock the iPhone Free with the IMEI Number
Newest] How to Unlock the iPhone Free with the IMEI Number