Sony Ericsson will be Rebranded as "Sony" by Mid-2012.

Last October 2011, Sony announced that they'll buy-out Ericsson's share for EUR 1.05 billion and will become a wholly-owned subsidiary of Sony, now it will rebrand it's smartphone and it'll drop the Ericsson from the company name and just be called "Sony".
In a comment made by Sony's Vice President Kristian Tear at Times of India.

A lot of planning goes into getting the branding right but we will be done by middle of next year. It will also mean that the marketing and advertising investments will go up. We haven't been as fierce as we were a few years back but we will step it up, refocus and invest more in brand-building in select markets and India is one of those markets.

It looks like the declining sales and marketshare made it easy for them to buy-out and re-brand their smartphones but it won't be easy for Sony to claim lost glory specially now that there are bigger players in the mobile phone market.