iPhone users usually need to sign in with Apple ID before accessing App Store, iCloud, iMessage, etc. However, once your iCloud Backup is activated, your iPhone data will be restored to the new device, including its App data, device settings, photos and videos, when your Apple ID is used on another iOS device (see Fig. 1).
Fig. 1: Data stored in iCloud
Although iCloud is quite a handy tool, it also can be very risky for users with crypto wallets. When iCloud Backup is turned on, your mnemonic phrases will be stored in iCloud (mnemonic phrases are App data). Suppose others get access to your iCloud account by various means (for example, phishing scammers trick you into changing your Apple ID password through text messages or phone calls, or someone obtains your password by dishonest methods, or you accidentally disclose your Apple ID password). In that case, they can sign in to your account on another iOS device and check your App download history. Once they download the wallet App you use, your mnemonic phrases will be synced to the new device automatically. That is to say, if you've enabled iCloud Backup, anyone who gets hold of your Apple ID credentials can empty your crypto wallet. Therefore, it is highly recommended that iPhone users turn off iCloud Backup.
How to disable iCloud Backup:
Go to Settings > [your name] > iCloud > iCloud Backup, then turn off the toggle (see Fig. 2).
Fig. 2: iCloud Backup disabled
- For iPhone users, it is highly recommended that you disable iCloud Backup in case of leaking mnemonic phrases.
- Keep your Apple ID credentials properly.
- Verify the identity of the customer support who informs you of suspicious account activities or other account issues.
- Make sure to keep your personal credentials safe, for example, your mnemonic phrases and private keys. Under NO circumstances will CoinEx Official support ask for your personal information. Please keep in mind that whoever asks for your private keys or mnemonic phrases is, no doubt, a scammer.