Nokia launched the Lumia 520 at the Mobile World Congress (MWC) event in Barcelona earlier this year. The smartphone has reached many markets globally and now a recent rumor suggests that AT&T will soon start offering the handset in the country.

@evleaks has posted a picture of the Lumia 520 on Twitter with AT&T logo, which hints that the handset will soon arrive on the carrier. However, we don't have a precise launch date of the handset.

The Lumia 520 has become one of the most-popular Windows Phone 8 (WP8) smartphones around. The Lumia 521, which is the T-Mobile variant of the Lumia 520 was launched in April this year and the handset has already made a positive impression on smartphone customers. T-Mobile is selling the Lumia 521 for $149.99 and the AT&T Lumia 520 is expected to carry a similar price tag.

Currently, AT&T has only three WP8 smartphones, including the top-end Lumia 920 and the mid-range Lumia 820 and the HTC 8X on offer. If Lumia 520 hits AT&T shelves, then the carrier will also have an entry-level WP8 smartphone on offer. Recent reports suggest that the rumored 41-megapixel camera handset, the Nokia EOS, will also launch on the carrier at an event scheduled for July 11.

The Lumia 520 packs in impressive features in its category that may attract customers looking for a handset with regular smartphone features. The smartphone sports a 4-inch IPS LCD capacitive touchscreen with 800 x 480 pixels resolution and 233 pixels per inch (ppi). The handset also has a 1430mAh battery, which gives up to 360 hours of standby time and up to 9 hours and 40 minutes of talk time on 3G.

The smartphone is available in a choice of vibrant colors such as black, white, red, magenta and more, but we don't know which colors will be on offer from AT&T.

The Lumia 520 may be ideal for customers looking for an entry-level WP8 smartphone but we will have to wait until AT&T officially announces the handset.