No phone signal due to water damage/corrosion?

Hi at all,

my friends Note 4 N910f (only a few months old) had some problems with the cellular reception and then suddenly it had no reception at all. It was always showing that there was no signal at all. So as you do, he took it back to his provider (VF) and they send it to their "repair shop".
But the results of the diagnosis weren't good at all. They say that water (or some fluid) damaged the motherboard so they won't repair his phone.

I attached the photo of the "technician".



But what I don't understand is that the phone was never in contact with water and always protected by a case. How can it corrode?

...And Yes the motherboard is corroded but everything else works fine: wifi, bluetooth, sim recognition etc...

So to all you experts out there, is this "water damage" or corrosion really the cause of the problem? Or better said do you think it was the cause? :confused:

Thanks for the help :good:

Attached Thumbnails

 

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