You can read the instructions for our Backbone here. If you would like to read, download or print the user manual of your Backbone again, you can open it here. Related articles How do I attach my Backbone to my smartphone? You can read the instructions for our Unity here. What exactly is the nanofoil? You can read the user manual of our High Five®, High Five®Signature, High Five® C and High Six here. How do I remove Backflip® from my phone?