A full spec list has leaked, and if true, this promises to be a huge handset in more ways than one. The screen's a mammoth 4.65 inches, packing Super AMOLED tech with a resolution of 1,280x720 pixels. Video capture is 1080p, with stills coming in at 5-megapixels, and a 1.3-megapixel front facer.
Despite its gargantuan size (not far off the Samsung Galaxy Note tablet), it's just 9mm thing. There's 32GB storage, a dual-core processor clocked at 1.2GHz, and it should have NFC for wireless payments.
It's due to be announced on Tuesday, at the Samsung Mobile Unpacked 2011 event. The conference is subtitled "Google Episode" so expect the flagship Android handset to have top billing. We'll bring you all the official news as it happens.