5Pcs Phone Signal Enhancement Stickers - Mobile Antenna Booster for Elevators, Mountaineering, Tunnels - Supports Two-Way Radios, Buzzers

Complete junk. It does absolutely nothing. No improvement at all.

Okay I've seen other reviews here that panned this little device, saying it doesn't work. I bought these for our Samsung phones, since we've been getting horrible reception and signal strength in our section of Houston Texas. I've used a similar product in the past, when you could still get to the battery in the phone. On a Samsung, without some specialized tools, you aren't able to remove the cover. These are designed to be used either inside the phone case, or on the back of the phone. I installed them on the back of our phones, power cycled the phones, and immediately went from 2 bars to FIVE (5) BARS!. We've especially had problems on our property, which is 15 acres in semi rural Houston. The nearest cell tower is approximately 1.5 miles away. Cell call quality is crystal clear, with no drops or static in the calls. I also went for a drive with the phones and signal strength remained between 4 and 5 bars on all phones. Considering that last night, I couldn't get more than 2 bars anywhere on our property and at most 3 bars off the property, I consider this a firm winner. My wife has her phone out at our property about 80 miles west of Houston, with the nearest tower almost two miles away and she is shocked at the strength and quality. My son is in downtown Houston right now and he just called me to let me know he's getting a solid 5 bars. Here's the one thing they don't tell you on the package but you'll want to do it. Take an alcohol pad and thoroughly wipe down the area you want to apply the sticker. Let it dry completely for five minutes, and then apply the sticker. DON'T touch the adhesive on the sticker, and smooth it down so that there are no air bubbles using the adhesive pad cover. Power cycle the phone and you should be rocking and rolling. 5 stars from us!

I have a low signal at my house. It toggles between 2 bars 4g lte and one bar 5g. I have tried these little "stickers" on every conceivable location on my Samsung a54 , without any change in signal. I even tried outside, no change there either. The phone casing is sealed, so I cannot place the sticker directly on the antenna, but I seriously doubt that would make a difference.

any strength increase was very little if any

well, it is like this. when i purchased these cards, i realized they are not powered. therefore, IF they help with the signal, it would not be much help. as i sit in my car in my garage, IF i could make a call, i sure couldn't hold a conversation with anyone. my phone would show no bars. i went out and sat in my car and held the phone monitoring the signal strength (no bars) and i used the paper the circuit board was attached to and move the circuit board around to various positions on the back of the phone. much to my surprise, i was able to get two bars. i can now make calls from inside my car in the garage. i give it five stars not because it significantly helped my signal strength, it did not, but because it did help my signal strength.

PRODUCT DOES NOT WORK REGARDLESS OF WHAT YOU DO, WHERE YOU DO IT, OR HOW YOU ADJUST IT TO YOUR PHONE! Worse order ever, an absolute waste of time and money!

2/10 true

Not the best, but it works.. gives you enough signal where you didnt

Was obviously skeptical how a sticker increases phone signal. Tried it multiple different ways and had no success. Same signal no difference at all. And yes I installed it correct as I tried it both inside and outside of the phone just to double check. Both towards and away from the internal antenna. It's just a typical scam don't waste your money

super

I was skeptical about these signal booster stickers but, since they were cheap, it wouldn’t hurt to try. I recently changed my cellphone to a Motorola G32, which has poorer reception than my previous phone. I wasn’t expecting this “gimmick” to work. So I decided to put the sticker to the test. Before I ran my tests, I found the location of my phone’s antenna by looking at a disassembly instruction video on YouTube for the model of my phone. I placed the sticker on the back of my phone near the antenna location. The first part of my test was at home, where my 4G signal is excellent. I turned off WiFi and used the Ookla speed test app to test both the download and upload speeds of my cellular network. I ran the speed test 6 times without the sticker and 6 times with the sticker installed, keeping my phone in the same spot and orientation. Without the sticker, the average download and upload speeds were 39.3 Mbps and 21.97 Mbps. With the sticker, the corresponding speeds were 43.3 and 22.47. This was a marginal improvement. I also measured a 2 dBm improvement, i.e., -84 dBm without the sticker and -82 dBm with the sticker, averaged over 6 readings. (In Android, you can check the signal strength from Settings->About phone->SIM status.) Having done that, I did confirm that certain positions of sticker placement either had no effect on the signal or even degraded the signal. Only a particular position improved the signal. Placement of the sticker in the right position is therefore important. The second part of my test was to check if the sticker could help pick up a signal where I was getting none. My daily walk is through 60 acre park in the greater Vancouver area. There is a particular part of the park where I would get no signal. But after I installed the sticker, I now get a signal through most (thought not all) of this area. In addition there was an improvement in reception in areas where the signal strength used to be low. I drove to low lying areas in my neighborhood where the signal used to be weak or non-existent. With the sticker installed I definitely see an improvement in these areas. Although this part of the test is anecdotal and not objective like the first part, the improvement I observed was noticeable. Conclusion of my findings: When the phone’s reception is already good, the sticker results in a marginal improvement. The overall improvement on the signal is small. However, in areas where the reception was poor, the improvement is more noticeable. The placement position of the sticker is important. Some positions can degrade the signal slightly. So experimentation is recommended. Additional thoughts: I did some research into antennas and radio frequencies to try to understand the science that could explain what I was experiencing. Radio frequencies (RFs) pass though materials like the thin plastic housing on a cellphone without affecting the signal. However metal actually modifies RF signals, by blocking, reflecting or, in the case of an antenna, absorbing RF signals while adding directional gain. This “phone signal sticker” is really a thin printed circuit board (PCB) on a sticker that resembles a PCB antenna. It is not a true PCB antenna, though, since there is no electrical contact between the sticker and the phone’s receiver. But there is a thin copper array in it, which means it will absorb RF and converts it to a charge. It is possible that this PCB sticker is working like a planar inverted F antenna. Another possibility is that it creates a distortion pattern that causes RF gain or loss depending on the position of the sticker. If this is indeed how it works, then the placement of the sticker very close to the area of the cellphone’s antenna is necessary for it to be effective. If you don’t have a schema diagram of your cellphone model, then check if there is a disassembly video for your phone’s model on YouTube. You should be able to determine the position of your phone's antenna.

Je peux même dire qu'après les avoir installé, le signal était encore plus faible donc ce n'est pas du tout recommandable. J'aurais dû écouter les autres commentaires mais je voulais quand même essayer. Je ne recommande pas ce produit, à moins que vous trouvez ça joli pour décorer

Signal went from -110 dBm to -104 dBm which was a 5.5% improvement. Had to move it around on the phone to find the best location to that improvement.