US handset maker Motorola acquired half the shares in UIQ, the smartphone software unit, from Sony Ericsson. Sony Ericsson had bought UIQ from handset OS maker Symbian last year. UIQ is essentially a graphic interface adding components to the Symbian OS. Symbian in turn is 47.9% owned by Nokia. Under UIQ, native programming can be made in C++ although the software does support the – in the mobile games space – ubiquitous J2ME standard. Motorola’s new flagship Z8 (nicknamed “MotoRzr” as in “riser”) is running on it already. The battle of the OS giants begins…

It is an interesting move since Moto has been the most active OEM for the use of Linux Mobile: it has released a whole range of phones for the open source OS featuring the penguin. It is also one of the founding fathers of the LiMo Foundation, an initiative it embarked on together with industry heavyweights NTT DoCoMo, Vodafone, Samsung, NEC and Panasonic (and which was recently joined by LG, McAfee, Broadcom, Ericsson and others). Now, I understand that Linux and C++ work together but must admit that my knowledge is more than limited here. It is in any event noteworthy that Motorola goes with a UI based on Symbian rather than straight-forward Linux. Motorola was quick to state that UIQ would only be “one of the actions to support [a] strategy” adding more investment in multimedia product segments.

With hundreds of millions in development cost at stake, it is probably too early to tell but it certainly is a new twist in the quest to uproot Nokia‘s top position with the Symbian s60 platform. So, what’s next?