I've just talked to amazon.de about the issue. While they agreed, that it is indeed a problem, they absolutely refused to send me a new device as an exchange, no matter what I told them!!
I even told them, that, according to EU law, I can choose between sending it in for a repair OR they sent me a new replacement unit. Of course I wanted the second option and it is my right to have it like I choose to. Still, they refused it.
Best of all: If I should decide to send it in, they would repair it in "our own repair center, this phone has to be repaired here, there is no other option!". But, their "own repair center" is the official and only Sony repair center in Germany!
So I could sent it in by Sony warranty, but I wanted it to do via amazon.
I'm so disappointed right now...I've been a loyal amazon customer for at least 13 years and this is how they treat their customers? They simply refuse what the law says...
I don't know what to do now.
Should I talk to amazon again? Maybe request to talk to this customer service guy's manager or supervisor?!
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BIG Edit: I've filled out their customer support form and was obviously disappointed and selected that another employer should call me.
That guy called me and he suddendly offered to me, that he can refund to me the WHOLE PRICE I've paid back in April! I bought it for 518€ (including shipping) and I would get that money back. All I have to do is sent back my device to amazon and then they'll refund the money to my account!
Once I have my money back, or even before if I choose not to wait, I can then order a brand new XZ from amazon (or somewhere else if I like) and receive full 2 years of warranty again!
Best of all: I'll get 518€ back and a brand new XZ at amazon costs only 450€ right now -> new device, without this fault + 70€ extra cash!!!
Guys, what should I do now? Go this route and order a new XZ and hope that it'll be fine without the issue OR wait until the Xperia Z1 is available, which should be at the end of this month and is currently listed for 611€?!!!
Or God beware, order a Samsung S4 active/Galaxy S4?!
I guess, once it's released, the price will go down even further...but even as of now, it'll cost me a mere 93€ to upgrade to a new Z1 (611€-518€).
What would you do? Or is the answer obvious?
Btw, the amazon guy said, I don't have to send it back right now, I can wait 30 days...