Here's something very strange. I have an N9 that I bought here in Mexico. [The glass is damaged and is the reason I ordered the other two phones from China.] The SIM card holder says it is an 059L449. The QR code on the device confirms that it is an 059L449. But identifies it's firmware as generic Latin America: DF61_HARMATTAN_40.2012.21-3 PR 001, not the product code variant of DFL61 HARMATTAN 40.2012.21-3.420.4 PR 420 for the N9 RM-696 Telcel MX MX Black V3.
About 6 months ago, I tried to get Telcel (Evil Carlos Slim corp) to unlock the SIM and they couldn't do it. So, I took the phone to someone who had an ATF dongle and used a service to brute force the code. I know that they didn't download or install another firmware. How did the phone change (downgrade) to a generic FW?