Yes, the 3 phones are on TELCEL... weird, isn't???
Hola/Hi.
I am too a Telcel user here in Mexico. I purchased the Lumia 1020 with my plan and was getting very impatient due the same thing: Available...but not. Why? Nobody knows.
But searching some threads some people successfuly updated to Black using the "Nokia Software Updater Retail", search it in Google. Once i installed in my PC this request to connect my device to it and automatically it searched for latest firmware, Black.
Was just a matter to wait to download it (for me 1.2 Gb) during the night and in the morning i took the risk maybe to avoid warranty but nah they are never efficient to check it.
Waited until it got installed and that?s all!....however, some features throught app updates showed Error 8000ffff, but there are some solutions in other threads here.
Why not try it like me? just be careful making backup before update. This will erase everything. Hope it works in your case.
Now i have Black with Lumia 1020 bought from Telcel.