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How can check if my Xperia M4 Aqua is still water resistant.
I've edited your post as this is an English only forum, you can use Google Translate to reply and/or post.
There's a test but I wouldn't rely on it, you should contact your Local support and request a vacuum test.
Hi @Tivi21,
As @uliwooly suggested you should get in contact with your Local support team if you believe your device is in any way damaged and does not live up to its IP classification.
Let us know how it works out.