can't download black update

[fotofon]

I have a lumia 1020 amber, it is unlocked. I tried using an active att sim to update the phone, but it always say couldnt download the update. I tried reseting, wifi and data are both on. Does anyone know what is going on?

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iPhone 6 forum

 

[dergutehirte]

Did you get an error code like 8075502 or something like that?