ViewSonic has officially announced the details of the 7-inch Android tablet that we knew it would be unveiling at IFA.

And the big twist is that it is, in fact, a massive phone.

The 7-inch, capacitive touchscreen, ViewPad 7 adds an extra 2 inches to the current big phone champion - the Dell Streak - and includes all of the features that you'd expect on a phone including full 3G phone connectivity with voice calls, texting and MMS all on board.

There is a slot for a full-sized SIM card so it will be interesting to see if ViewSonic announces any network tie-ups over in Berlin, or whether the device will be available SIM-free.

Apart from the phone features, you're looking at a Froyo tablet device, with a VGA front-facing camera for VoIP video calls, a back-facing 3-megapixel camera, Bluetooth, Wi-Fi and GPS connectivity; as well as a USB port and a microSD slot for memory expansion.

The ViewPad 7 also offers an office document reader, hand-written note functionality and ebook reading.

"We are proud to announce another world first at ViewSonic", said Derek Wright, European product marketing manager.

"3G phone functionality combined with dual cameras gives the ability for use of Android apps to use augmented reality or video calling on the move with the benefit of an excellent 7-inch screen.

"The ViewPad 7 is aimed at users who require the ‘always on’ connectivity they are used to from a mobile phone with a more agreeable screen size for longer term use".

The ViewPad 7 will cost around £350 and should be available in October.

ViewSonic will be showing off the ViewPad 7 over at IFA where we'll be getting up close and personal with it.