From the above, you know that reset old iPhone will not affect the new one. So just feel free to erase your iPhone to make sure your data is protected. ► Attention: Please make sure you have made a full backup for your old iPhone in case you might need some of the data one day.
A factory reset just deletes all your user data locally on your phone. Data stored in the cloud and synchronized to other devices linked via an account and are not affected.
Whether you plan to trade in your old Android phone for a discount on your new phone, sell it on eBay, give it away to a friend, or drop it off for recycling, you're going to want to wipe it of all your data first by resetting it to factory conditions. Luckily, that's pretty easy to do.
You can log your old iPhone out of the Apple ID / iCloud and create a separate Apple ID for it. This is the real issue that you are facing. Both of your iPhones are using the same Apple ID and therefore are overlapping data, messages and notifications.
When you tap Erase All Content and Settings, it completely erases your device, including any credit or debit cards you added for Apple Pay and any photos, contacts, music, or apps. It will also turn off iCloud, iMessage, FaceTime, Game Center, and other services.
Don't worry, resetting old iPhone will not affect the new one. It will only erase content on old iPhone where the operation is done. The data that have been transferred to the new iPhone or the files that have been saved to iCloud will not be affected in any way.
While it's not the same thing, you can remove old phones from your devices list. Go into your Google Play account and click on settings. You will see a list of all the devices you've connected to your account. You can rename them or untick them from your list.
Go to Settings > General > Transfer or Reset iPhone. Do one of the following: Prepare your content and settings to transfer to a new iPhone: Tap Get Started, then follow the onscreen instructions. When you finish, return to Settings > General > Transfer or Reset iPhone, then tap Erase All Content and Settings.
If you have an iPhone and another iOS device, like an iPad, your iMessage settings might be set to receive and start messages from your Apple ID instead of your phone number. To check if your phone number is set to send and receive messages, go to Settings > Messages, and tap Send & Receive.
When you do a factory reset on your Android device, it erases all the data on your device and returns the phone back to its original out-of-the-box state as it was from the factory.
Data Security
When it comes to Android phones, they don't have much secure way to delete data. Even if you reset the phone, there are still chances that your data can be recovered. Any person with some technical know-how can recover the data.
No. Resetting a device to factory settings will log you out and might delete the apps associated with your account from your device's memory. Factory reset won't delete your Google, Facebook, Instagram, or any other accounts.
Disadvantages of Android Factory Reset:
It will remove all the application and their data which might cause a problem in the future. All of your login credentials will be lost and you have to sign-in all of your accounts again. Your personal contact list will also be erased from your phone during the factory reset.
Does factory reset deletes data from iCloud and iTunes? No. Factory reset of iPhone doesn?t delete your information from iCloud or iTunes backup.
iOS devices do not pair to each other. They each may be connected to the same Apple ID. This means they share data and content, but through Apple's servers, not directly with each other. A factory reset of your device will not remove any data from your account, only the device being reset.
If all your data fits on the new device, you can transfer your data to the new device without removing anything. If you're moving to a lower-capacity device, you might need to optimize or remove some of your existing content.
All the critical and sensitive information will be shared mutually between the two iPhones. The other iPhone user can access all the text messages, photos, and call logs. The other person can change the playlist. The other person can change the password and lock your device.
You have to active the new SIM card, which will automatically deactivate the old SIM.
Choose an option: WARNING: If you choose the Erase All Content and Settings option, all of your content is removed. See Erase iPhone. Reset All Settings: All settings—including network settings, the keyboard dictionary, location settings, privacy settings, and Apple Pay cards—are removed or reset to their defaults.
The connectivity between iPhone and iCloud means that if you delete a picture on your iPhone, it's also removed from iCloud.
When you tap Erase All Content and Settings, it will erase your device completely, including any credit or debit cards you've added for Apple Pay and any photos, contacts, music or apps. It will also turn off iCloud, iMessage, FaceTime, Game Center and other services.
You can sign out of one and still be logged in on another device. Keep in mind if you delete something from iCloud on one device, it will be deleted in iCloud on all devices. Hope this helps.