It just cant verify the old pin we are using it in wp8.1
So we have to either disable it or change it
To make it work again
If your phone locks up when entering the sim pin , press cancel and go to settings>system>phone and disable the pin
Just enter the pin there if prompt
While disabling it
Or just hard reset ur device
So we have to either disable it or change it
To make it work again
If your phone locks up when entering the sim pin , press cancel and go to settings>system>phone and disable the pin
Just enter the pin there if prompt
While disabling it
Or just hard reset ur device
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