Sony has detailed that the Xperia M, Xperia M Dual, Xperia L and Xperia SP smartphones will not be updated beyond their current version of Android Jelly Bean.

It is worth mentioning that while the Sony Xperia M, Xperia M Dual and the Xperia SP (Review | Picture) currently run Android 4.3 Jelly Bean, the Xperia L would stay limited to Android 4.2 Jelly Bean, as seen on the Sony's official Xperia Care website.

All four smartphones feature 1GB of RAM and dual-core Krait processors, which on paper are sufficient to run Android 4.4 KitKat smoothly, so Sony's decision is a little puzzling.

On Tuesday, Sony rolled out Android 4.4.4 KitKat updates for its Xperia Z (Review | Pictures), Xperia ZL, Xperia ZR and Xperia Tablet Z (Review | Pictures) devices. However, Sony hasn't provided a detailed changelog or time frame for the Android 4.4.4 KitKat update as yet.

In May, Sony had rolled out Android 4.4 KitKat updates for the Xperia Z, Xperia ZL, Xperia ZR and Xperia Tablet Z. It had also brought the revamped Sony native app portfolio with the update which included upgraded versions of Messaging, Email, Smart Social Camera and Battery Stamina Mode apps, among others.

Last week, the Japanese giant announced the Xperia Z3, Xperia Z3 Compact, and Xperia Z3 Tablet Compact at its pre-IFA 2014 event in Berlin. The company also announced the two new wearables - the SmartBand Talk and SmartWatch 3 - in its SmartWear Experience range.

Two new lens-style cameras - the E-mount ILCE-QX1 and DSC-QX30, priced at $400 (approximately Rs. 24,000) and $350 (approximately Rs. 21,000), respectively - were also launched at the same event.

Update: Alongside the Xperia M, Xperia M Dual, Xperia L and Xperia SP, Sony has detailed that the Xperia C will also not receive an update to Android 4.4 KitKat, and will officially remain on Android 4.2.2. Jelly Bean. It was launched in India in October last with Android 4.2 Jelly Bean, and first unveiled in June with Android 4.1 Jelly Bean.