Det finns eu regler som reglerar garantier också, se nedan.
I bought a phone just over a year ago, and it has stopped working. The trader refuses to fix it for free. Do I have a two-year legal guarantee?
The legal guarantee is valid for a period of two years throughout the EU. But there are certain conditions.
The legal guarantee covers any defects presumed to have existed at the time of delivery and which become apparent within a period of two years. However, the crucial period is the first year after you bought your product:
Any fault that appears within one year will be presumed to have existed at the time of delivery. The seller must then repair or replace your phone free of charge, or reimburse you if repair or replacement is impossible.
After one year, you can still hold the seller responsible for any defects up to the end of the two-year guarantee period. However, the seller can ask you to prove that the defect existed when your goods were delivered. This is often difficult, and you will may have to involve a technical expert.
https://europa.eu/youreurope/citizens/consumers/shopping/guar....
https://www.vice.com/en/article/yp3nax/jailbreaking-iphone-ro...
https://www.ifixit.com/News/15464/warranty-voiding-stickers-a...
Oavsett vad det kallas så kan man aldrig få sin telefon nekad i EU för reparation bara för att man har jailbreakat. Oavsett om det är ett moderkort, telefon etc.