Nokia could be looking to release two new devices to add to its Lumia line of WP8 phones according to a regulatory filing in Indonesia. The smartphones, called the Lumia 520 and the Lumia 720, are likely successors to Nokia’s Lumia 510 and Lumia 710 devices, respectively.

Their inclusion on the list indicates that both won certification from Indonesia’s equivalent of the FCC on Wednesday, according to

Nokia Lumia 520 and 720, WP8 Smartphones 2013, Nokia Mobile Devices

Not much is known about the two new smartphones, but judging from the naming, the Lumia 720 should be a mid-range device, while the Lumia 520 would be Nokia’s low-end offering this year. Both devices are expected to launch in Q2 2013, and could very well be unveiled at Mobile World Congress 2013. We’ll definitely keep our eyes open for these phones at the event progresses.