I have 2 iPhone X's. One has been taken out of service and replaced with a new phone but the old phone still has all my content and data on it. Will erasing the data and content on the old phone also erase the data and content on the new phone.
iPhone XS
No. You may also want to do the entire following procedure: What to do before you sell, give away, or trade in your iPhone, iPad, or iPod touch - Apple Support
No. You may also want to do the entire following procedure: What to do before you sell, give away, or trade in your iPhone, iPad, or iPod touch - Apple Support
erasing all content and data
