Pressure Sensor test

[Newcomer]

Hi all,

Yesterday I purcahsed a brand new Z3 Compact. I read that in order to test its waterproof capability, without actually putting it into water, you can dial a weird number and check if the device reacts to pressure, using the Pressure Sensor.

Unfortunately, the pressure increases by a few millibars when I apply a normal pressure on the screen, then, while I keep putting pressure, the pressure drops to its baseline (~1004.4 millibar).

I read that while applying pressure, the pressure should increase drastically, and it shouldnt decrease while you still apply the pressure (also it makes prefectly sense!) 

I'm pretty sure every lid is sealed properly, and they are clearly undamaged or covered with dirt, as my phone is brand new.

What should I do? Is my phone damaged? I bought that model becuase the water/dustproof was very appealing, but if in my case it is not, I want to fix it.

I have a 2 year warranty, but I wonder if demanding a new decive based on the results of this home-made test is admissilbe?

PS I saw a post here regarding that pressure test, but it was left unanswered...

Thanks!

[Newcomer]

Your jump in the millibar is satisfying and probably guaratntees your phone is sealed (basic physics after all).

I wouldn't have tried putting it in water either, but knowing that it can withstand a fall into the water and survive afterwards, is reassuring, while I can't say the same on my device, as it failed the pressure test...

 By the way, if you remove your headphones jack and test it again, will the pressure still increase?