switel DF 911 Mode D'emploi page 183

Appendix
gross negligence by the manufacturer.
If your device shows signs of defect during the period of guarantee, please
return it to the sales outlet in which you purchased the SWITEL device
together with the purchase receipt. All claims under the terms of guarantee
in accordance with this agreement can only be asserted at the sales outlet.
No claims under the terms of guarantee can be asserted after a period of
two years from the date of purchase and hand-over of the product.
GB
43