If you replace the screen of iPhone 11 or 12 series, whether it is a genuine screen or a third-party repair display,
you will see the notice “Important Display Message” on the iPhone (As shown in the picture below).
It shows unable to verify this iPhone has a genuine Apple display. Here are some tips to fix it
Step 1: Click here: https://ibeta.me/
Step 2: Find the corresponding IOS plug-in, click to download and install. 
Follow the installation method
If you don't want to upgrade your IOS system, you can also choose other beta versions below.  
Step 3: Restart after completion, the warning window will not pop up again.
If you have any questions, feel free to contact Krina for help. 
△Notice: Using this method, the pop-up window may appear again after the phone is restarted or the system is updated, but there is no pop-up problem with BIZBEE INCELL 11, 11 PRO, 11 PRO MAX screen.
Please contact Krina for a latest wholesale price
Register account on Bizbee website with 'Krina' and order online
You could get the discount as high as 100usd!!!
BIZBEE LIMITED
Web: www.bizbee.com
Tel: +(86) 15818991178
Krina Hong-Bizbee Sale manager
Whatsapp/Wechat/Phone: +86 15818991178
Email/Skype: krina.hong@bizbee.com
Add: Xinghe World, Wuhe Blvd South, Longgang District, Shenzhen, China