I am trying to do phone authentication on a device that has no SIM Card, with the phone number inputted is active in another device. The result I get from this test in Android is that I get unknown error ( the error message is "unknown" ).
More interestingly, the result vary from device to device. I tested 4 devices, 2 of them successfully "requested" code using phone number in another device and the SMS is sent successfully ( and the code in the SMS works ), while another 2 showing the error above.
The devices that are successful:
The devices that show the error:
All devices should be able to request the code through SMS, although it doesn't have SIM card.androidfirebasereact-nativefirebase-authentication