Quite a few phones offer water-resistance these days, but typically it only covers you down to a metre under the surface.
No wonder, then, that Sony's making a big deal of the gear it'll showing off in its IFA 2014 event tomorrow, teasing that it'll happily take the plunge as deep as 2m under the surface.
The latest Sony teaser ad follows last week's glimpse of the Xperia Z3-based smartphones and tablet we're expecting to break cover tomorrow in a preview video clip.
This time Sony's taken to Twitter to get the message across, posting a pic taken at the bottom of a swimming pool together with the text “2m?” below a downward-facing arrow.
The text accompanying the pic provides a further tease: “We'll be getting deep at #IFA2014. But how deep..?”
It's just a guess, Sony, but might the answer be, um, 2m?
If so, that'll top the 1.5m water resistance offered by the recently revealed Sony Xperia M2 Aqua, which is IP65/68-rated. However, the IP68 rating potentially covers submersion in up to 3m of water – it's up to the device manufacturer to specify.
Probably the more important question is which Sony mobile products will be covered by the deep water protection? There's actually a fair chance that all three of the Xperia Z3, Xperia Z3 Compact and Xperia Z3 Tablet Compact will get the nod.
Sony has generally retained the majority of key specs in its product families regardless of whether you're talking the original, mini or tablet variant, so there's every chance weather-proofing could follow suit.
We'll find out tomorrow, folks.