iPhone 7 'Device Unknown'
 

Hey guys, wondering if anyone here experienced similar problem with iPhone 7.



After erasing the phone, it shows Device Unknown when on the activation screen after the phone setup. Also, it doesn't recognize the charging cable/not charging and shows 'Searching/no IMEI'.


Could it be just a bad Tristar or the BB/RF_PMU is also broken?

Update, it was a partial short on C2927 (PP3V0_PROX_CONN) which caused the problem.

check voltage pm9645