How can I unlock frp lock?

Below is the link having a complete guide to bypass FRP Lock on ZTE Phone. https://www.unlockninja.com/blog/how-to-bypass-google-account-reset-zte-phone-factory-reset-protection-frp/
You can also unlock your zte phone here: https://www.unlockninja.com/unlock-zte+phone

There are a lot of methods to bypass the Google FRP lock. The easiest method to bypass the Google FRP is Google TalkBack method in which you will have to enable Talkback and after enabling Talkback, use the L gesture on your screen in which you will see the Talkback setting, scroll down and click on Help & Feedback, will see the help menu and there will be a youtube video on your screen, play that video and select "Play on YouTube App" and after opening YouTube app, go to settings and select "Terms & Policies" , after opening the T&C menu , select a text and search it on Google, and after opening the Google app search for Google FRP unlock app and you are good to go

Yes, you can unlock it. By the way, unlocking the FRP or bypassing a google account is getting hard day by day but it is still possible. Going through some steps will let you unlock your device bypassing the google account.

• Download the FRP Bypass APK from the computer or through any device.
• Now, you have to place the tool in a USB drive.
• Turn on your device
• Follow the guided process until you reach to the google account including part
• Connect your device to the USB drive
• Install the FRP Bypass APK
• Open the app and go to settings
• Factory reset your device. then click on erase everything and confirm

for more details visit FRP Bypass APK

WAKE UP FROM SLEEP MODE • Press the Power key to activate the display. • Long press on the screen to unlock. • You can pinch out on the lock icon to get quick access to Phone, Email, Messages, Audio, Camera and Calendar apps. SWITCH YOUR HANDSET TO SLEEP MODE Press the Power key to activate sleep mode. Sleep Mode activates automatically with the timeout set from Options > System settings > Display > Sleep. TIP If you set an unlock pattern, PIN or password you need to enter it to unlock the screen. If you forget your pattern or PIN use your Google Account password to reset the phone. This will only work if you register a Google account with this handset.The above instructions ARE NOT for the FRP lock, which requires the Google Account information that the device was set up with. Were you asking about the FRP lock?

Have you tried out the FRP Bypass APK? A lot of people use this tool to get rid of the FRP issue. Why don't you try out the FRP Bypass APK?

• At first, download the tool and copy the tool in a pen drive
• Start your device and fill up the setup wizard
• Connect your device to pen drive through a USB OTG cable
• Install the tool from the pen drive
• Open the tool
• Go to settings
• Now, factory reset the device and erase everything. That's it.

For more details visit FRP Bypass APK

i think you have got lock your ZTE phone because of FRP security feature of Google
you can unlock your phone by using bypass FRP bypass apk. After searching on internet i have got a great guide which has explained a detailed solution to unlock FRP
here is the link to the article :
Learn To Bypass FRP FRP Bypass Guide Download FRP Bypass Apk