When using Android mobile phone to transfer money, if the U shield screen is not bright and the error "U shield signature failed or incomplete" is reported, please try the following operations:

1. If it is the first time to use the universal U shield, please charge it for 3 hours first.

2. Please confirm whether China Industrial and Commercial Bank is installed. If not, please download it through m.icbc.com.cn website.

3. Please set the sound effect to allow "China Industrial and Commercial Bank" to access the microphone and display the floating window according to the brand of the mobile phone.