With the Nokia Lumia 620; the newest handset in the company’s Windows Phone family having already taken to the stage, we were left wondering what the Finnish mobile manufacturer might be keeping up their sleeve ahead of their Mobile World Congress press conference at the end of the month.

In truth we already have our suspicions following our last trip to Nokia’s London HQ where we learnt that the 620 might not sit at the lowest end of the new Lumia range, which based on this rumour, is shaping up to hold water. The Nokia Lumia 520 and the Nokia Lumia 720 will add two more gradients of differentiation in Nokia’s new Windows Phone 8 device portfolio should arrive to market sometime in Q2 this year.

Nokia Lumia 520 and 720 spotted

According to Nokianesia, both handsets are on track to come to the Indonesian market, but we see no reason as to why one, if not both handsets will reach other regions (including the UK) as well. Both device names cropped up following certification from Directorate Post & Telecommunication Indonesia on Wednesday.

The successors to the Nokia Lumia 510 (which never came to the UK) and the Nokia Lumia 710 are anticipated to show their faces at MWC and hit the market not long after March.