WiFi and Bluetooth certification entries for Lumia 520 and Lumia 720 reveal Four variants of Lumia 520 and Two variants of Lumia 720.
Lumia 520 will come as RM-914.
Lumia 521 for T-Mobile is RM-917.
Lumia 520T for China Mobile is RM-913.
Lumia 520.2 is coming to Australia, North America, South America as RM-915.
Lumia 720 global variant is RM-885.
The China Mobile specific variant Lumia 720T is RM-887 which we found earlier from “Occasional Gamer” data as well.
From the certification it seems Lumia 520 will see a full global release while Lumia 720 still is doubtful for North America at least !!