[Galaxy S III General] BarryH_GEG:
Adam's way off base. Here in the U.S., it is perfectly legal to invalidate a warranty based on customer induced damage or for violating the warranty terms themselves. For example, Samsung's U.S. warranty has enough exceptions to drive a truck through when it comes to being able to deny warranty coverage for a modified device. I’ve bolded the ones most applicable.

What is not covered?

This Limited Warranty is conditioned upon proper use of the Product.

This Limited Warranty does not cover:

(a) defects or damage resulting from accident,

misuse

,

abnormal use

,

abnormal conditions

, improper storage, exposure to liquid, moisture, dampness, sand or dirt, neglect, or unusual physical, electrical or electromechanical stress; (b) scratches, dents and cosmetic damage, unless caused by SAMSUNG; (c) defects or damage resulting from excessive force or use of a metallic object when pressing on a touch screen; (d) equipment that has the serial number or the enhancement data code removed, defaced, damaged, altered or made illegible; (e) ordinary wear and tear; (f) defects or damage resulting from the use of Product in conjunction or connection with accessories, products, or ancillary/peripheral equipment not furnished or approved by SAMSUNG; (g)

defects or damage resulting from improper testing, operation, maintenance, installation, service, or adjustment not furnished or approved by SAMSUNG

; (h) defects or damage resulting from external causes such as collision with an object, fire, flooding, dirt, windstorm, lightning, earthquake, exposure to weather conditions, theft, blown fuse, or improper use of any electrical source; (i) defects or damage resulting from cellular signal reception or transmission,

or viruses or other software problems introduced into the Product

; or (j) Product used or purchased outside the United States. This Limited Warranty covers batteries only if battery capacity falls below 80% of rated capacity or the battery leaks, and this Limited Warranty does not cover any battery if (i) the battery has been charged by a battery charger not specified or approved by SAMSUNG for charging the battery; (ii) any of the seals on the battery are broken or show evidence of tampering; or (iii) the battery has been used in equipment other than the SAMSUNG phone for which it is specified.
​

As for Magnusson Moss, when Asus first started asking people to invalidate their warranties in order to unlock the bootloader, I asked one of our in-house attorneys if it was legal because I didn't think it was. Since unlocking the bootloader doesn't affect the operation of the product as originally Asus intended it to be sold its within their right to obviate your warranty if you agree to it.

Let's use an example following Adam's logic. Someone ships their phone off to Samsung because the headphone jack died. They say it's not covered under warranty because the bootloader's been unlocked and that non-Samsung s/w run on the device contributed to its failure. The phone owner says under "Magnusson Moss" you have to prove that my unlocking the bootloader caused the damage. They say that'll be $175 to repair the phone or $25 to ship it back unrepaired. At that point, those are the only two choices. Someone can later file reams of paperwork, invest gobs of time, and wait months for any type of relief either through legal channels or some state or government customer rights group but the phone will remain broken until then. No one can make Samsung fix a phone for free if they refuse to without putting in a lot of stress and time. What Adam says in this video is way over simplistic. You can have all the rights in the world but getting/having them enforced is a totally different matter.

[YOUTUBE]9YcIHaajda8[/YOUTUBE]