Few days ago, I shared a blog post “How to unlock AT&T Lumia device without inserting SIM?” that talks about a way to unlock your Lumia handset of AT&T models without inserting SIM card. The steps are easy but a little bit tricky while pressing the star (*) button.
Today in this post, I am going to share you another simple, effective way to unlock the device without inserting any SIM cards into it.