
iPhone comes equipped with a plethora of settings and features aimed at enhancing device security. As a result, users can rest assured while using their mobile phones with ultra-secure privacy settings.
However, some iPhone users may notice that without setting up the iOS operating system, the phone displays all content from various apps such as SMS, Facebook, Zalo, etc., on the lock screen. Therefore, in some cases, leaving your phone in a public place could expose your messages and sensitive personal information to others.

Why should you set a message password on iPhone
Therefore, whether using an iPhone or any other phone, users should hide message content on the screen. Additionally, setting a password can prevent others from reading message content without the correct password if they happen to borrow your phone.
It's evident that hiding and setting message passwords on iPhone brings many benefits to users, helping them safeguard their private information.
2. Guide to setting passwords, hiding messages on iPhone
To set passwords or hide messages on the iPhone screen, you can follow these methods:
Method to lock message display on iPhone lock screen
When you receive a message on iPhone, the lock screen will display a notification with part of the message content. To prevent others from viewing the content without unlocking the phone, you need to hide the preview of the message like hiding Zalo messages on the lock screen, which can be done by setting on the iPhone screen. To do this, follow these steps:
Step 1: Access Settings on your phone => Select Notifications => select Messages

Method to lock message display on iPhone lock screen
Step 2: Select Show Preview => At this point, the screen interface will display 3 options
- Always: when a message arrives, the message content will be displayed on the lock screen
- When unlocked: can only view message content when the lock screen is unlocked
- No: the message content will not be displayed as a preview on the lock screen or notification bar of the iPhone.

Select No to lock message content display on iPhone screen
To prevent others from viewing message content when the phone is on the lock screen, select “No”. Then, users need to enter the phone password to unlock it in order to view the received messages.
Method to set message password on iPhone in Settings
Apart from disabling the preview feature on the lock screen, users can set a message password on iPhone to enhance personal information protection.
Setting app limits password is also a way to help users block notifications from apps during the specified time. This action will restrict users from searching for the message app on the phone and accessing it without a password.
Step 1: Go to Settings => Select Screen Time => Choose Use Screen Time Passcode

Use passcode to limit message usage on iPhone
Step 2: Enter password to set limits and confirm

Enter password to open messages on iPhone
Step 3: Sign in to your Apple ID account as instructed => Press OK
Step 4: Begin setting up security by selecting App Limits => Select Add Limit => Choose the app you want to set usage password for => Press Next

Add apps that need usage password on iPhone
Step 5: Customize the limit time and press Add, now your app is restricted and requires a new password to open
On the screen interface, any app that appears dimmed with a sand clock icon indicates it's restricted. If you want to use it, you must Request More Time by entering the previously set Screen Time passcode.
Using software to lock messages, set passwords on iPhone
Besides the methods mentioned above, users can also set message passwords on iPhone using third-party software. However, to perform this password setting, your iPhone needs to be Jailbroken. Nonetheless, Jailbreaking your iPhone might void Apple's warranty. Hence, consider carefully before applying this trick!
Currently, there are numerous apps supporting message password setups for iPhone, such as Iencrypttex for iOS, Black SMS, LockDown Pro, …
Step 1: First, you go to the App Store and download the Lockdown Pro app => proceed with installation on iPhone

How to set message password on iPhone using Lockdown Pro
Step 2: Proceed to customize settings with the following options:
- Safety Word: Create and register an account to use the app
- Password: Set up a password for your phone account
- Confirm: Re-enter the password for confirmation
Step 3: On the main screen, open the Messages app and proceed to set a password to access the app => After following the instructions, users need to enter the new passcode to view messages.
Here are the methods to set message passwords on iPhone to help you protect your private messages with super simple and convenient steps. You can try it on any iPhone model (iPhone 11, iPhone 12, iPhone 14 Pro Max 512GB). Wish you success!