The EUCD was the DMCA pushed through the EU by trade agreements. In some ways it's worse, since it lacks the safe harbor provision.
The end user situation isn't as bad though because there are other laws that protect you. In Sweden there is a provision that it is specifically allows it for interoperability reasons for example.
Funny you mention Germany though. It is one of the few countries that tried to outlaw "hacking tools", broadly defined as including a lot of reverse engineering tools you would use for the purpose you mentioned. I don't know what happened with that, perhaps the situation have improved?
No.
Warranties are voluntary and distinct from seller liability for defects in the product. That liability is legally required in the EU. The details of the implementation are different in different countries.
In Germany it’s like this: The seller (and only the seller) is liable and you have to go to the seller to make a liability claim. So if you bought your phone from Amazon you have to write Amazon, not Motorola. If you bought it from a carrier you have to go to the carrier. If you didn’t buy the phone directly from the manufacturer that manufacturer doesn’t have to do anything when you come to them with a defect phone. It’s the seller’s problem. (This is mostly to prevent a runaround, where seller and manufacturer both tell you each other is responsible for fixing the problem. This creates one entity that is clearly and obviously responsible and has to handle the problem.)
It’s for defects present when the device was sold and that’s it. (However, subsequent defects of some component because the device was delivered with some faulty or not up to spec components count, too.)
In the first six months the seller has to prove the defect wasn’t present when the device was delivered to not be liable. You, the buyer, don’t have to prove anything. That burden of proof, however, reverses after six months and up to 24 months (then there is no more liability), making it very hard in practice for buyers to prove after those six months that the defect was there when the device was sold. (However, courts have relaxed the requirements for that. Buyers usually don’t need to get some expensive expert opinion or something like that. If you can make a very good and informed argument for your case you should usually be covered.)
The seller can repair or replace the device. Buyers don’t have right to get their device replaced when it’s possible to repair it. If repairing and replacing fails a number of times (I think three) the buyer can demand their money back.
That’s the liability. A legal requirement and very complicated – and also wholly distinct from warranties.
By unlocking your phone you may have voided your warranty, but you certainly didn’t void the legal liability of the seller.
Oh, and in some countries the law has more teeth: here in Portugal the burden of proof never shifts during the 24 months :)
Also if a contract contains a clause forbidding you to disassemble, decompile, or debug something, then the clause is automatically void.
Yay for EU rights.