For those of you who are interested in making your own (super tough) custom, carbon fiber case, you might be interested in how this one user from XDA Developer did it with an $8 carbon fiber film:
Order up a sample for $8 from carbonfiberfilm.com which includes free shipping; only took two days for mine to get to Idaho from the East Coast.
Get a piece of cardboard or other safe cutting surface, then remove the battery cover.
You’ll need the sample, an X-acto knife with new blade and a hair dryer.
Cut some off the end of the sample so it’s just slightly bigger than the battery cover.
Make sure the battery cover is clean and free of grease and dirt, then align the sample with the case, remove the backing and then place it on as smoothly as you can. You can use a credit card to smooth any bubble out; I didn’t need one, but that’s what to use if need be.
After getting it somewhat stuck on there evenly and free of air bubbles, heat it up with the hair dryer on low to heat shrink it a bit.
Take your x-acto knife and use the battery case as your guide. I was very careful, took my time and used common sense, and somehow managed not to slice any part of the case away or scratch it. I rough cut the extra from the back to the front, then from the front to the back for the last touch up of the excess.
After that, re-heat shrink it and make sure it’s all the way sealed down on the edges.
As far as the speaker holes go, just do the big ones and use a sowing needle just big enough to go all the way though the hole; from the front to the back, push then pull the needle though 2 or 3 times per hole, you might have to use some pliers to grip the needle to pull it all the way though.
It’s been a few days now and it’s still sticking down perfectly, feels great and the employees at the sprint store were very into it. Haha.
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