Can I also stick the COMPIT universal adapter onto a soft cover or directly onto the back of the smartphone? 07 February 2024 18:21 Updated No, the adapter only works with hard cases. Please never stick the universal adapter directly onto your smartphone, always use a hard case. Related articles Is there a COMPIT mount that can be attached to the centre of the handlebar together with a Bosch Kiox display? Which COVER can I use if I don't have one of these smartphones? What mobile phone cases does sks offer for the COMPIT system? Can I also use the +COM/CHARGER in the rain? What could be the reason why the +COM/CHARGER is not charging my smartphone?