Smoe android devices can not connect to ble while starting dfu. The android duf library i used was https://github.com/NordicSemiconductor/Android-DFU-Library,but in some android devices,it reported error below:
Connection state change error: 133 newState: 0
Device not reachable. Check if the device with address C5:6A:42:98:0A:F9 is in range, is advertising and is connectable
It seem the mac address wan changed,but in some other android phones ,it worded fine.
The Problem Phone Model is:
Device Name:Galaxy S9
Model:SM-G9600/DS
Hardware:MP0.9A
One UI Version:2.1
Android OS:10