The Sony E2105 and E2115 model numbers have been revealed by the Indonesian Postel regulatory site. These are the first 2015 Sony Xperia model numbers that we have come across, denoted by the ‘E’ at the start of the model number. All 2013 Xperia models used the CXXXX designation, whilst for 2014 they used DXXXX.
The Sony E21XX is likely to be a budget model – the equivalent handset in 2014 was the Xperia E1 Dual (D2104, D2105). So what we could be seeing here is the Xperia E4, to follow the existing naming scheme. Seeing it appear on the Postel site on 26 November means this new phone could see an announcement at CES 2015 in early January. We’ll bring you more as we have it.