Chosen Solution
Hi I have a iPhone 6s that needs to be restored, however it gets to around 80% and crashes. The alert that pops up says “Unknown error occurred (66)”. I have tried to search for it, but I am struggling to find any reference to an error code 66. When I opened the phone I noticed it’s battery has been replaced and also it looks to have had a new screen also. The home button looks like it could be the original as it has an Apple logo on it. Don’t know if these could effect the restore or if they would be different error codes if it was an issue. Has anyone else had this issue or know where I could find more information on it?
Thanks
As I have never seen this error before, I would try the following. · I would try a restore on another PC with another known good certified cable and battery with latest iTunes installed. · Remove the logic board from the housing and just connect screen, dock and battery. · If it still gives the error check the log and try and determine what it is doing when the error occurs. Have you tried restoring with 3uTools? It still will not restore but you can see what action it is doing when it fails. In my experience if it fails at 80% it usually means a Baseband problem but could be different with iTunes.
I work on phones almost everyday. this is an issue i have run into on many phones. none of the repairs would do this. are you trying to get information onto this phone or was it in recovery mode?
Hi guys , I have the same issue iphone 6s which occurs error 66 on itunes at 95% . I have reball both Baseband pm and processor But the problem still same . Also i tried changing different nand which is 128gb but no solved . After that i also changed logic eeprom which is near wifi ic but failed. I think they have made some new error 66 which never seen by anybody
