The processing of the product appears at first glance faultless. However, it takes time, the Sonim XP3 is the first "insert", because this bag like a second skin to the phone - not a millimeter more space is available. This I initially perceived as very annoying and I thought that me the wrong bag had been delivered.
With patience and numerous "stretching" to let the sound processed zipper finally close. The bag is made of leather and the clip system provides several ways. The clear plastic front of the display, however, is nothing special.
The real drawback: who XP3 Quest can call your own, the Sonim his will, unfortunately, have to realize that both the speaker and the camera lens on the back may not enjoy "free look". So the cell phone pocket must be removed (and this is not a source of joy). The clip-on belt clip feature can also to be desired that on a random collision "from below", the phone is immediately gone.
As a second option, the phone can still be done in "the box type belt" with what promises stability, but is completely unnützt when the Sonim should first ring.
The telephone call to be assumed is in fact not possible, because the cell phone has to be taken out of his pocket or alternatively the snaps of the bag must be opened only once to get the phone in the hand - both processes take too long and the caller has already abandoned.
Conclusion:
4 points for a good processing of the case, but their Funktiolität unconvincing.
Buy recommendation: a resounding "no"