Good for the manufacturer and seller, bad for the customer

An interesting phenomenon my handset has thought up: after just over a year in my possession, it was to an alarm clock. The handset starts as if by magic to vibrate, thereby making an incredible noise. The first time I was happy, because it has just woken me indeed timely. Unfortunately, it did not stop at a single event, but happens in a cycle of 10-20 minutes since.

The handset has never been dropped and has always kept safe. The seller (in my case, electric Franck GmbH & Co. KG via Amazon Marketplace) calls for ensuring now that I evidence that this defect already existed at time of purchase (the burden of proof after 6 months).

For the short "fun", provided by the equipment, it is simply too expensive.