That is the million dollar question, I don't know. When I bought it I was told by the seller that it was recently network unlocked, I brought 2 sim chips with me to the purchase meet to make sure I was not being scammed everything seemed fine. but now when I did the android 8 update my imei number now reads all zero's. I'm not new to cell phone repair or unlocking, I have an unlock box,(Smart Clip 2) and i use Chimera on a regular basis. I wanted to do the imei repair myself but am locked out. If I can use Smart Clip to find the service programming code I don't know how, with Chimera it is an unsupported device at the present time.Like I said I am not new, but I am far from being a professional. Any help would be very great full, even what device or software I would need to acquire this number, be it from the phone or to generate it. Thanks