LINE phone number disguise measures that we found out using
・ Confirmation of SIM information of the terminal ・ Confirmation of network connection status ・ Confirmation by illegal examination algorithm
If you pull out the SIM card and send it, it will be not notified
It cannot be re -authenticated unless the phone number is linked
When I inserted the canceled SIM, the phone number was notified and I was able to send it.
The iPhone has a different number from SIM
I was able to notify the number even in the "no SIM" state without the SIM card
If you restart the iPhone without SIM, you will be in a non -notification state
Even in situations where re -authentication is not possible
■ Related site LINE Phone Official Blog