What happens if you put someone elses apple ID into your iPhone?

If I put a friends apple ID into my phone will I receive their imessages? Will they receive my messages? Can I still text all my friends with iPhones through SMS from my actual cellphone number?

If you log into your phone using someone else's Apple ID, they will get an email notifying them that a new device has activated that ID. If you use someone else's Apple ID in your iMessage, they will get a text popup on their screen that says their phone number is being used for iMessage on whatever type of device you have.

On your phone, it will say that it's validating your credentials with the other person.

If it gets validated, you will receive whatever you have checkmarked (i.e.safari history, texts, facetime calls, notes, mail,… Etc.) Don't do this unless you have their permission.

I'm using my sisters phone, but forget email addre

  • Would you get a notification on your iPhone if your Apple ID was used to log into another device? I'm unsure if I have unknowingly given my Apple ID to a scammer in the past, but I curious would I have received a notifcation on my iPhone, in a form of a text or pop up? I've heard that before and I wanted to make sure. Even if you didn't have two-factor authentication on.
  • What happens when you put your iphone into dfu mode when its turned on? I had my iphone on and put it into dfu mode( i think thats what its called ) but i held down the home and power button for ten seconds and then let go of the power button and continued to hold the home button for another ten seconds. My screen went black and now it won't turn on! I plugged it into itunes and restored it. Will that fix everything. If not help me please!
  • What happens when you block someone on an iPhone 6, and they text you or call you? Specifically, does the phone keep ringing or does it say the call can't be made? Does the text deliver and just never show up on the receiving phone, or does the sender get a message saying the text can't be sent? (The other phone is not an iPhone.)
  • What happens if you put the inncorect password into an iphone? My iphone 5 was just stolen and I want to know what will happen when they put the password in a ton of times and get it wronge. I know it will get disabled for 60 minutes or whatever but what happens when they make the phone reset itself? Will the password go away after that or will it remain there? I just don't want them to be able to get into the phone even if it is all cleared.