I apologize, I left the previous question too vague . My iMessage and FaceTime after a factory reset . According to your answer if I’m understanding you correctly ? My Apple ID , phone number , IMEI , ICCID , all are registered .. so a factory reset dose ? Because from my understanding my iPhone or Apple ID recognizes my devices and automatically grants them access if I previously logged in on such device ? I need to change my Apple ID but keep my iPhone and number . But I do not want all the other devices associated with me , my number , Appel ID, email or any other form of syncing going on !! I need my iPhone to be my iphone !! I don’t want it syncing with any other devices automatically. Even if I’m on the same network . I have a Ex who is very tech savvy . He knows all the back doors of getting into iPhones . He taught me a lot .. Hence factory reset .. I thought would get rid of the syncing issue !! But it dose not .. I have not been Abel to work because I can’t get privacy no matter what I do .. so in the last 6 months I have changed my number 4 times including new physical sim , my Apple ID at least 6 times , I’ve lost all emails , social accounts that I’ve had for 15 years Finally in October I bought a new phone , straight from the Apple store because they kept saying there is no way anyone can get into my iPhone .. ( bull). I took the new phone straight to my carrier with there help I set it up with all the recommended security’s . On top of that I got a second “ SAFE “ number to use to give out to everyone .. I’m there 4 hours I leave and less the 24 hours . My iPhone is sending me voicemails that was on my other iphone !! And from there you should be Abel to guess that my iPhone is not secure .. because ???? I’ve been told it is a third party app !! It is this it is that !!! But it isn’t any of that !! It is because Apple can get into Apple .. all this technology is wonderful but truly. I would just like to have my privacy from everyone including other Apple users !! Apple is great but really making things easier for a Apple user is making it dangerous for unknowing customers . Let drop a pic to a friend opps there goes a piece of info , let’s check our email on someone’s Mac pops there gos more info , let’s sign in on our brothers internet oops there gos info !! Apple , Mac, Microsoft , it links !! Information even when you don’t wNt it too !! That is not safe …. That is dangerous !! Now how do I get it to stop !!! Please help and people read your contracts fully and know what all your fancy apps do !! Or what they won’t UN DO !! All these special functions should have to come with a warning first and foremost ! I have emailed I’ve talked to many many Apple tech and everyone just continues to deny or say just factory reset !!! Lol what a joke !! It dose not do any good !!! Here I am 6 months not working , no privacy , and a iphone that I can’t use well I can use it but not with any kind of privacy or security .. so therefore really useless .. anyway .. I’m sure this will be another step of wasting my time .. but I needed to try .. thanks in advance to anyone that can help .. please I wish I knew 6 months ago what I know now .. Apple begging started with an amazing humble man with integrity who wanted things easier without the loss of security .. when it started it was about Individual independence with security now it is Apple security .