Got WP 8.1 Developers Preview & Amber Fw on Lumia 920 Telcel M?xico, why?

[Manx77]

Hi everyone, got Lumia 920 in Telcel M?xico with Developers Preview WP8.1 installed and Firmware Amber. I understand i must have Cyan. Anyone experienced this issue? I tried to use the Nokia Update Tool and just reboot my phone and got an error in the program but nothing more happens, my phone reboot and function properly. Thanks.