If Sony Ericsson is considering changing the Windows Mobile OS which it is currently using for their upcoming Xperia X1, that must mean only one thing: Sony Ericsson won’t split up just yet and they will continue to create smarter phones.

Earlier rumors about an Xperia delay were based on the issues Windows Mobile integration presented. Is that why Sony Ericsson is considering an alternative? What is it going to be? Symbian? Android? Something custom?