There has been no shortage of handset announcements over the last few days, due to the CES electronics show currently taking place in Las Vegas. There are too many to cover individually – and most of the devices are remarkably similar – so heres a quick round-up of the smartphones unveiled this week by Sony, Samsung, Huawei and ZTE.

Huawei has unveiled its first Windows Phone 8 smartphone, the Huawi W1. The W1 has a 4” screen, and is powered by a Qualcomm Snapdragon S4 dual-core 1.2 GHz processor, and Adreno 305 GPU. But the most impressive stat being boasted is the handsets battery life. With a 1950 mAh battery, the W1 promises 470 hours – thats nearly 20 days – of standby time.

ZTE, meanwhile, has announced its ZTE Grand S, the flagship device in its Grand range of handsets. At a thickness of just 6.9mm, its apparently the thinnest 5” FHD (Full High-Definition) smartphone on the market – not the most broad of categories. The device runs Android 4.1 (Jelly Bean), and is powered by a Qualcomm Snapdragon S4 Pro 1.7GHz quad-core processor.

Samsung announced its Galaxy S2 Plus, an updated version of the handset which has been superceded by the S3. The S2 Plus runs a newer version of Android (4.1.2), and some versions will feature NFC, but its otherwise identical to the original S2 – featuring the same 1.2 GHz dual-core processor and 4.3” WVGA display. Its a bit of a strange move, and the handset apparently wont be launching in the UK.

Finally, Sony announced two smartphones, the Xperia Z and accompanying ZL – a similar handset with a smaller form factor. The Xperia Z has a 5” 1080p display, runs on Android 4.1, and is powered by a Snapdragon S4 Pro 1.5 GHz quad-core processor.