not prompted to enter device unlock code when using new sim card from different carrier
I was approved and received a device unlock code from at&t for an HTC One M9. As stated in the instructions received via email I entered a new sim card, turned on the phone and waited for it to fully turn on but was never prompted to enter device unlock code. Please help if there is another way to enter the code? I saw mentioned in the notes that it will be permanently locked to at&t if there are 5 attempts or more, if this happend is there any way to reset the phone to give me 5 more attempts?