When I initially reviewed this “Tile” on February 8th, I was unhappy that it ate all my data in five hours. I still cannot figure out if it was the TILE I had or my phone app for the TILE. The manufacturer was kind enough to send me another, since I had returned the ones I had. Although now I have unlimited data, I checked it over 24 hours, leaving the TILE app ON in the background of my new iPhone. There was very limited usage and that was mostly from other apps. The ring tone to find your iPhone seems louder and better. It’s easier to hear, but it will never stop ringing its sound until you turn it off. This could potentially eat up battery life. However, now I can find my keys and my iPhone easily. It still does not hear well though walls but then it would have to be a siren. This works for finding things simply by walking around until you hear it. I still think the price is a little more than I ‘d like to pay, but it did turn out to be a good product. OLD review: This device seemed like a very cool extra to find my lost keys or wallet or iPhone. But, nowhere in the instructions or on Amazon is there any notice to SHUT OFF or SIGN OFF the Tile Mate app. Unlike other apps. this one keeps going unless you sign off or power off your device. I learned the hard way. Tile Mate used up over 4.7g of my data in six hours. I only buy 5g per month and average a 1.25g a month. When I tapped my iPhone after six hours, it gave me a Data Usage Warning, rendering my iPhone useless other than phone or text. Because I had 21 more days this month, I had to pay $30 to get my data back for this period. As far as hearing the beeping tone at 150 feet, it was disappointing. I went about 100 feet from one room to the other and could barely hear it. This was without ambient noise – totally quiet. I checked all the similar devices on Amazon and felt this was the best option. I’d be interested in knowing if other similar devices have this issue. It’s a great idea, but it needs some work – especially at the price. I returned the two Tile Mates.