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My ZTE Blade Z Max for some reason does not want to recognize any sim cards that i put inside of it. I recently bought an unloc
k code but I have no way to input it because its not accepting USSD dialer codes. The metropcs unlock app does not work either i receive an unlock failed and unlock approved message on the same screen. To top it all off the signal icon is just an empty triangle now no bars at all. Only recieving the emergency calls only alert and no service. Ive tried switching between 2g/3g/4g/Lte but to no avail. APNS are properly set as well. What is going on with this phone i cant figure it out.