Defects can occur for a variety of reasons.
If your request is not a warranty/guarantee case (e.g. because the warranty period has expired), use our service OKM Device Check: We check the functionality of devices and accessories sent to us which are not covered by warranty or guarantee.
1 unit = 1 device
If you are not sure whether your request is a warranty/guarantee case, please contact us via e-mail or use our contact form.