












Green light: Normal ;Red light :Need to adjust antennas

Detect and optimize the incoming signal strength to the best performence

Excellent Heat Dissipation, Better Signal Anti-interference
1 Smart Indicator 2 Cast Aluminum Body 3 Cast Aluminum Body


Super Magnetic,Just Put it on the car roof. No more worring it fall off on the go

Place the inside antenna face to where you need the greatest signal boost.

Place booster in your desired location at least 24 inches away from inside antenna.
1 Outside Antenna 2 Mount Inside Antenna 3 Mount the Booster

Parameter Comparison
Add to Cart Add to Cart Add to Cart Add to Cart Price $109.00$109.00 $119.00$119.00 $129.00$129.00 $122.55$122.55 $99.00$99.00 Bands Supported Band 12 ,13 ,17 Band 12 ,13 ,17 Band 2,4,5,12 ,13 ,17 Band 2,4,5,12 ,13 ,17 Band 4 ,66 Usage Scenarios Car,Truck,RV Home,Office Home,Office,Trailer Home,Office,RV Home,Office Max.Gain of Booster 50 dB 64dB 64-70dB 64-70dB 64dB Outdoor Antenna Type Omni Magnetic Antenna Directional LPDA Antenna Directional Yagi Antenna Omni Antenna Directional Yagi Antenna Outdoor Antenna Gain 3 dbi 7-9dbi 8-10dbi 3-5dbi 7-9dbi Need to locate cell tower ✘ ✔ ✔ ✘ ✔ Manual Gain Control ✘ ✘ ✔ ✔ ✘ Cable Length 10ft+10ft 33ft+16ft+16ft 33ft+16ft+16ft 33ft+16ft+16ft 49ft+16ft Includes window entry cable ✘ ✔ ✔ ✔ ✘ Power Supply Input:12-24V;Output:5V 1A Input:100-240V;Output:5V 1A Input:100-240V;Output:5V 2A Input:100-240V;Output:5V 2A Input:100-240V;Output:5V 1A【Before Purchasing】-Please ensure your phone’s frequency bands display band 12, 13, or 17 and that you receive at least 2 bars of signal outdoors. If not, the car cell phone booster may not function properly. (Check the product image for instructions on how to check frequency bands.)
【Which Carriers Are Compatible】-No matter ATT ,Verizon,T-mobile,Straight Talk which carrier you use as long as your phone band is using band 12 13 or 17.
【How Cell Phone Signal Boosters work】-The outdoor antenna receives signals from surrounding signal towers on the go, which are then amplified by the booster and transmitted to cellular devices such as smartphones indoors through the indoor antenna. It only works for band 12, 13 and 17 signals. Other frequency bands and Wi-Fi signals are not applicable.
【Does C20 Boost 5g Signal 】- The C20 will only amplify your 5G signal if the 5g band your phone is using is band 12 13 or 17.
【What C20 Can Help You with】-The C20 cell signal booster designed for car&RV.Used to solving the dropped cell phone calls and slow loading 4g lte 5g network on the road . Committed to improving signal strength to ensure call quality and data upload and download speeds.
【Excellent After-Sales Service】 – We offer timely technical support, you can contact us anytime, anywhere by email.
【FCC Approved】 — The booster is compliant with the requirements of the standards applied. FCC certification number: 2ALZEL50VA-01. Approved to operate on frequency bands 12,13,17, without interrupting or harming any cell carriers’ signals to and from the cell tower.product.”>Details)

Dave –
This cell phone booster makes a huge difference at my home. From red to green.
This is my first cell phone booster, and I’m really impressed with how well this works. I first laid out all my cables, and connected them (DO NOT turn on the booster without both antennas being connected), then turned on the booster. Much to my surprise, I was able to make connections to the cell tower on all 4 bands, and the antenna was pointed at the ground. After I got my antenna installed, the signal was actually too strong, and I had to dial back the gain on the LTE band. After I got it installed and setup, it was time to test it out. As you can see from my pictures, the difference between using the booster and not using it is huge. Around my home, my signal (without the booster) is typically in the red, or if I’m lucky it’s yellow. I have to go outside if I have an important call, and want to make sure we can hear each other well. After installing the booster, I find that neither of us are asking the other to repeat what we said. It has truly made a world of difference in my home.The instructions are straight forward, and easy to understand. Installation is trivial. You get all the most common parts you could most likely need, including extra coax, and a special super thin coaxial jumper, for running through a window. They even give you a waterproof seal, to seal up the window where you run the cable through.I get conflicting information about if your should register the fact that you’re using a cell phone booster. It seems some cell phone providers want you to inform them, and others don’t care, and some prohibit the use of cell phone boosters all together . But what about the FCC? It appears, from what I’ve been able to find, this is not the type of booster that needs to be licensed and registered. They do make boosters that require a license to install, but that is not this type of booster.This cell phone booster is not magic. It requires that you can get a good enough signal from the tower. If your signal from the cell phone tower is weak enough, then this booster won’t perform well for you. If you get spotty or marginal cell phone service on your cell phone, then I expect this booster will work well for you. If you get absolutely no signal at all, and you’re not near a cell phone tower, then this will do nothing for you, because you have no signal to work with.I’m so happy to have this cell phone booster. It works better than I imagined, and I can recommend it. If you’re in an area with marginal cell phone service, then this will make a world of difference for you.
Nate N –
As advertised
So far so good. Easy set up and installation. Iâll update review when I get an in area with less cell coverage.
Linda –
Stronger Signals
After struggling with weak cell signals in certain parts of my home, I decided to try this signal booster, and it has been a game changer. From the moment it was set up, I noticed a significant improvement in the signal strength. Whether I’m in the basement or upstairs, my calls are clear, and I no longer experience those frustrating drops. It also supports multiple carriers, so everyone in the house benefits, regardless of their service provider. The installation was straightforward, and the coverage easily extends throughout my entire house. Itâs been a relief to finally have reliable reception in every corner.
Mr. B. –
Don’t waste your money!
The car cellphone booster claims to boost signal but i tested the signal download/upload before and after using the booster with t-mobile and spectrum and 2 different devices. The tests were done without a VPN with consistent servers on both OOKLA and Open Signal apps as well as Google speed test. The device was displaying both green lights and the booster significantly reduced the upload and download of both devices. I am not happy for wasting money and time installing this device.
Bobbie Saben –
Exactly What We Were Looking For!
We are so please with this cellphone booster! We had been having so many issues lately with our cellphone signal where we live. I was happy to find this and when we received it, we hooked it up right away. It has helped tremendously! Not sure what we ever did without it.
Glass –
Works, but be careful bout the bands you need.
I will say that having used much more expensive boosters, you do get what you pay for, and that’s why I’m giving this one four starts. I wish the cable was quad shield coax, which would also allow me to make a custom length one. That’s much harder with the type of cable they used, which also pails in comparison for its RF shielding abilities. The shell of the unit is also metal, which makes you think it’s suitable for mounting outdoors. It’s not, unless you put it in a weatherproof box. You should also plan on putting some lithium or silicone grease in the fittings for the cable connections – especially the outdoor antennas, or you WILL have tons of corrosion on the SMA fittings overtime. There are no weatherproof seals on the smaller joints. The lack of band 66 is also notable in today’s day and age, when at&t and Verizon heavily use it as one of their primary LTE bands.All of that being said, while I would normally knock a device down to two or three stars for these issues, I’ve gotta say….this thing is well worth the hundred dollar asking price, and if you’re the type of person who can competently install one of these, you should already know what bands you need to boost in your area (if you can live without 66) and you should realise what you need to do to waterproof the seals as well. For the price? You’re not going to beat this.And yes, it does exactly what is says and adequately amplifies the signal in a large living-room (think 600 square feet) and maybe a bedroom or two…..but don’t expect it to actually do 5,000 sqft indoors with lots of walls. None of the units that claim 5k sqft really get over 2 in my experience….unless you’re installing it in an open warehouse. 🙂
MANUEL TARABAY –
No tire su dinero
No sirve. Hay pérdida de la señal.
Amazon Customer –
Same reception signal
No change in reception signal
Amazon Customer –
Delivered on time. Will edit later with details on effectiveness of the booster.Update:Pros: Inexpensive booster, it improved call quality, and it was easy to set up.Cons: Range on the inside receiver is very short (under 10 feet) and the instructions could be better.We installed this booster to improve cell phone call and data quality at our cabin in eastern Prince Edward Island (PEI), Canada. The nearest cell towers are 15-20km away and signal strength usually sits at 1 bar with poor audio quality and frequent call drops. Under the right conditions, the booster was able to improve signal strength by +25dB and get up to 4 bars, greatly improving voice call quality.Before purchasing this booster, confirm which cell phone bands you’re receiving in your area and buy a booster that suits those. There are instructions online, in this product ad description, or I’d recommend the Android app “Network Cell Info lite” (free) to confirm the band and signal strength. The bands we received in PEI fluctuated between 4, 12, and 13.The package included everything in the description and there was enough cables to use in our small cabin. The outside antenna is light and looks tough enough to handle east coast weather. A longer mini-coax cable could be needed for a larger home or taller antenna mast. The instructions included were decent but were missing some items, such as weather-proofing the cable junctions with the included rubber tape. Watch the video in the ad description to see how to apply it. Hooking up the cables and hanging the inside antenna was easy. Installing an exterior antenna mast (not included) would be more involved.We didn’t end up installing the outside antenna on the cabin exterior and just attached it to a wooden stand on the second floor and pointed it out a window at the nearest cell tower. It took a few tries to orient the antenna to get the maximum signal improvement. Look up where the cell towers are in your area and point the antenna as best you can.I was disappointed in the range of the inside receiver, where you need to stand within about 6 feet of it to get a noticeable improvement in signal strength. I had hoped that placing it centrally in the cabin would cover the entire building, but it did not. We moved the receiver adjacent to the kitchen table and had people sit next to it when making calls to make sure they got some signal boost.Overall I am happy with the performance of the booster, though I wish the inside range was a little longer.
Claude –
The product works well. Signal strenght is better than before even more now (january) because there are no leaves in the tress around my house. During the summer, the signal was a bit weaker BUT still better than with no booster.
sabby –
Cell boosters, much like banks, seem to operate on a similar principle: they offer ample assistance when you don’t need it, but struggle to provide sufficient support when you truly require it. This comparison brings me to evaluate the performance of the Phonetap booster against the Cel-fi Go X G32, which ultimately became our chosen solution.Initially, with a 4G LTE signal strength hovering around -105 dBm, the Phonetap booster managed to boost it to approximately -75 dBm, functioning adequately about 80% of the time. However, we encountered occasional call drops and periods of over an hour without signal. Moreover, the signal range was limited to within about 2 feet from the indoor antenna, necessitating the phone to be kept in close proximity for optimal reception.Seeking a more dependable option, we opted for the Cel-fi Go X G32. The unit’s software facilitated precise antenna positioning, allowing us to increase our signal strength from around 200 to about 220 units. While we’re uncertain of the exact metric, the software indicated a significant improvement, with an initial input strength of approximately -9 dBm categorized as “poor,” boosted to around 0 dBm labeled as “fair.” Ultimately, we achieved a signal strength of approximately -45 dBm, experiencing no issues or call drops thus far, though we’re yet to encounter severe weather conditions.However, the main drawback lies in the considerable cost of the Cel-fi Go X G32, which is now being succeeded by the even pricier G41. The justification for this high cost seems elusive, especially considering the artificial limitations imposed on the unitsâsuch as boosting only one carrier at a time and excluding flanker brands like Public Mobile, favoring only top-tier carriers like Telus. The fact that the G32 is the sole unit approved by Telus for boosting on their network raises suspicions of collaboration between the manufacturer and the carrier, potentially inflating prices and restricting features without technical justification.The Phonetap’s only practical application appears to be for those already receiving decent reception indoors but seeking improved coverage in specific areas, or for individuals residing near cell towers lacking high-speed internet, using the booster to enhance bandwidth access. However, these scenarios represent niche use cases and do not align with the product’s apparent positioning, thus I cannot recommend the Phonetap for broader applications.Therefore, if you require a reliable connection for voice calls and contend with a weak initial signal without alternative solutions, I would recommend investing in the G32 or the G41 if the former is no longer available.Update 1:We have encountered severe weather our G32 has not failed us.Update 2:I had mistakenly assumed that the G32 did not boost flanker brands but actually realized that the unlikely culprit was that one of the phone used in testing was somehow lacking band 13, which is what our cell tower is using for 4G LTE. I can now confirm that the booster simultaneously boost all flanker brands as well. For example, if you set the booster to boost Bell, you will have lucky mobile boosted as well.
max –
Boosterâs been installed 3 weeks ago and we are satisfied. Everything is working and doing good since. Had to install the outdoor antenna a meter higher than our rooftop because we live in the woods at the bottom of a hill. Installation went well, instruction manual is easy to understand. We will have to wait to see if it resist our canadian winter.
Marg Hodgins –
So we bought this just before closing for the season and since it’s seasonal, we didn’t want to put the booster up permanently until spring. We attached it to the end of a 12 foot 2 x4 and stood it at highest part of cottage. We did notice an improvement in signal in a wider range of area than we were able to use before. We are excited to see what it will do even further to enhance our signal when we attach it to the peak of the roof when we reopen in the spring. Our cell phone carrier is Bell Canada and our cottage is located in the Muskokas in Ontario