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Recently bought an iPhone 6 that wouldn’t turn on, the battery was the culprit and when I changed and reset it it was fine. Although when trying to put in my iCloud account it says ‘verification failed can’t connect to apple I’d servers.’ also when I try to perform a software update it says unable to check for update, am error occured while checking for a software update Any help troubleshooting is appreciated

Hey fellas just reading thru and notice something when i repair a 6 before, after the repair it would not connected to anything. So i went back into the phone and notice the little communication lines that run from top board to bottom board had little ground loops that the metal contact lay in. Go back into your phones fellas and see if those communication wires are into the small ground loop holders. Hope this helps. P.S. Sometimes you just have to retrace your steps.