Problem with my modem router ZTE ZXV10 w300

Hello,
Here is my problem:
I have a ZTE ZXV10 W300 modem router for Djaweb and I want to secure the Wi-Fi because it's open, so if someone walks past my house with an iPhone or some other device, they can easily use my connection. I don’t know how to set a password on this modem. Can someone help me solve this issue?

type the address 192.168.1.1
user admin
login admin
in the interface setup click on Wireless:
1- Authentication Type: choose a key type for example WPA
2- enter a security key of your choice in Pre-Shared Key (shared key) for example abac11dd
click on save
now if you want to connect from another PC, it will ask you to enter the security key you type abac11dd
there you go good luck

Yo
It's not always possible without going through customer service. To find out, type 192.168.1.1 in your address bar. If that doesn't work, try 192.168.0.1.

It should ask you for a login and a password.
Try combinations like:

user: admin
pass: 1234

or

user: admin
pass: admin

Once logged in, go to the "wifi" tab, or something similar, and set a password. Choose WPA2-PSK, but pick a really complicated password, not something easy to remember (like with #, $, numbers, accents, uppercase/lowercase letters, etc.). It should be between 8 and 10.

Choose WPA2-PSK -> AES

Thank you friends, the problem is solved
just follow the steps of zdh setup then wireless... etc
for the user and password I set it to admin, admin and it's done
I believe my wifi is now secure

First, connect to http://192.168.1.1/
you will be asked for a username and password

for both fields, enter "admin"
then go to "interface setup"
click on "wireless"
look for "Authentication Type", there you choose instead of "disabled" set it to "wep-128bits"
a new table will appear, go to key 1 and delete 0x00000000000000000000000000
and replace it with a password of exactly 13 characters, then click on save,

there you go

But do we disconnect the connection or do we stay connected?