UPDATE 2 (31JUL2017):

** DON'T BUY THESE, THEY'RE GARBAGE (see UPDATE 1) **

But, if you want excellent phone gripping materials that will last, then buy the $5.81 anti slip "GRiPhone Narrow" strips (shipped from Japan)(non prime item - 3 to 4 week delivery wait period). They work great, and was well worth the wait. After testing the first order, I placed a second order, to use on different slippery items around the house. It is an excellent product.

AGAIN, stay away from "egrips'" garbage.

UPDATE 1 (one day later; dropped rating from 4 stars to 1 star): The item provided an excellent grip on my Galaxy S8 for about 3 to 4 hours, then the gripping ability ceased. The tiny knobby area (that which provides the gripping capabilities with your hand) went flat, and became very slick and slippery. Then the thin layer of tape, which covers the rubber strips, peeled off. Thus leaving a very slippery piece of useless rubber. What a terrible product.

--Original review--
Best phone anti slip grips out there. But, overpriced ($13.95). Should be $8 prime or less. They provide an excellent grip on your phone. No more worries about dropping your slippery $800 phone or phone case anymore.

I tried several anti slip items and tapes. This is by far the best out there for your phone and portable power banks. (Hence the overpricing)

I am waiting for the $5.81 anti slip "GRiPhone Narrow" strips to arrive from Japan (non prime item - 3 to 4 week delivery wait period); so I can see if they compare to these. If so, I will buy 2 of those for less than the price of one of these ($13.95).

Job well done egrips, but you need to come down on your prices a bit (minus 1 star).

I'm now making a second purchase as I've had this on my phone for 2 1/2 yrs of heavy use and it's finally wearing off on the edges.....see pic I need a new case and figured I'd buy a new grip also. Thankful for Amazon history and could find this prior purchase to purchase again. It makes my phone grip everywhere I go....to center car console, on my leg sweating on the beach, on counters, on the lawnmower/snowblower, etc. and the application of it is thin enough that i can still easily put it in and out of pockets, bags, etc.. If it starts to get a a little dirty from normal use just wipe with a wipey or wet paper towel and everything comes right off and it also refreshes the grip. I can't say enough about this product!

Update: these didn't last long. The Sticky part comes off quickly. Not worth the cost.

Put these in my mophie case because I thought it would help me grip it better. Easy to install, affordable, and great clear product to see the color of the phone etc... but the tacky part of the product peels off if you try to put in your pocket or purse. Great idea... maybe I need to try the full sheet ones or a heavier duty one.

First the good, it is sticky. Unfortunately, the seller's description is not as accurate as it should have been. I purchased this item to help me deal with the very slippery nature of the mophie battery case for the iPhone 6s Plus. The case is extremely slippery and I figured a product such as this, was available. I read reviews of various items and decided to trust the egrip. Since my case is a battery case, it comes in 2 parts and therefore I had to cut this item. Instructions said it is easy to cut, easy to apply, blah blah blah. See pictures below. Again, if you are buying this to stick on the back of your phone, you have my general blessing to give it the "ole college try," but if pictures say 1000 words, see below and decided for yourself. For $14, at the least, I would have expected 2 films and a better type of application process as well as better directions.

One of these is sufficient to keep my S7 Edge from sliding around. Perfect fit....placed it right where my hand usually rests holding the phone. Good grippy feel. When I set the phone face up on the arm of my leather rocker/recliner, it doesn't budge. Doesn't slide off my car console now. Easily removed without residue. I've added one of these to each of my 3 cases. Works equally well with a naked phone. I've used this brand on previous phones and they stayed clear, didn't yellow.

Tried one that covered the entire back but found it was overkill. This size works better for me. Recommend.