A handset with that model number was spotted running Google's latest Android build and powered by a quad-core processor under the hood. Nokia 1100 has been spotted in a benchmark, where it was caught running on a quad-core CPU alongside Android 5.0 Lollipop as the operating system of choice.
Microsoft's acquisition of Nokia's Devices and Services business stipulate Nokia can no longer use its brand on smartphones till Q4 2016, and on feature phones for 10 years.
Recently, Nokia have launched its android based tablet Nokia N1. The tablet was first launched in China in 2015 and have made a record of selling 20000 units in 4 minutes.