Bumper

[eng3]

I find this phone extremly slippery in my hand.  I'd like to get a bumper to add more friction to the sides but have yet to find one.

The closest thing I can find are bumpers that have a back to it.  Unfortunately, this adds to the thickness of the phone making it more bulky.

[Uliwooly]

@eng3

The only suggestion here is to check ebay, amazon, etc to find a bumper case that works for you, or apply a film protector. 

[SebastianD]

I couldn't find a real bumper (without a back). The aluminium ones reduce signal quality.

So I went for TPU. After trying "Orzly flexi slim" and "Orzly fusion bumper" without any luck today I've received an "IMAK Series 2 hard case" which is slim fit and it looks awesome. Also adds a good distance to separate the back camera lense. And it cost half the price. (Less than 5€ )

[SebastianD]

I forgot to say that it also adds a little grip. It's hard plastic, generic tick TPUs are obviously better, but phone has more grip now than naked.