Do you often feel headaches because of customer complaints about screen touch problems?
Here, Bizbee give your the technology support :)
TIPS:
1.To confirm whether the using system is IOS 14.5.1 or IOS 15.0. 
These two systems are not stable and have BUG. 
Update the system can solve the touch problems. 
2.Can be upgraded to IOS 14.6 or 14.7 system.

PS: The two systems have the following BUG, please avoid using these systems. 
IOS 14.5.1: With bugs like APP flashback, overheat, frame drops, and performance degradation. 
IOS 15.0: With bugs like APP flashback, overheat, vibrate with sounds, rings without sounds. 

Bizbee also have a professional inspection team to control quality
Faulty rate low as 0.76% and get many good feedback from clients :)
Wholesale Price Now!!! Why not contact Krina to get it?
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