When it comes to gleaning very early details about new smartphones, one of the best places to discover references of new models is in ad network log files. This is exactly where Alan Mendelevich, who operates an ad network called Adduplex, discovered references to new Nokia Lumia smartphones. The man discovered references to four new devices in the log files.
The discovery of the devices in log files for an advertising network means that at least a few of the phones are in use in the wild, presumably for carrier testing. The log file showed entries for the Nokia RM-914, believed to be the Lumia 520. Logs also showed an entry for the RM-885 or Lumia 720. The 520 is expected to be a cheap low-end device while the 720 is thought to be a midrange device.
The log files also showed entry for unidentified devices called the RM-887 and the RM-860. The Lumia 720 and Lumia 520 have been mentioned in previous leaks carrying the codename Zeal and Fame respectively. Both devices are known to be Windows Phone 8 handsets.
A few specifications have leaked previously indicating that the Lumia 720 would have a 4.3-inch screen, a 1 GHz dual-core processor, 512 MB of RAM, 8 GB of storage, a six megapixel camera on the back, and two-megapixel camera on the front. The Lumia 520 was tipped to use a four-inch screen, a 1 GHz dual-core processor, 512 MB of RAM, 8 GB of storage, and a five-megapixel rear camera with no front camera indicated. The other unnamed Nokia devices are thought to be high-end Verizon handsets the Laser and Catwalk.