[Q] Case for Quadlock system

I am looking for any recommendations to be used in conjunction with the Quadlock system.

http://www.quadlockcase.com/collections/android

For this, I need to glue a sticker to the phone, or rather a sturdy case. Two options I considered were :

Ringke fusion : I am not sure if this will provide enough protection in case I accidentally drop the phone.

Roxfit gel shell : I wonder if the plastic back is properly secured to the tpu case. If it's not, then the phone would still fall.


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