SureCall Fusion4Home Cell Phone Signal Booster up to 2000 sq ft, Boosts 5G/4G LTE, Omni Outdoor Antenna, Home & Office Multi-User All Carrier, Verizon AT&T Sprint T-Mobile, FCC Approved, USA Company

While there may be similar products out there with better performance characteristics (and I don't know of any), I doubt that there's anything that comes close to this unit's specs and reviews for the price. HOWEVER, before you buy this or any other signal booster, use the tools available to evaluate the signal at your proposed installation site. As has been pointed out by various reviewers here, If you have no signal, there is nothing any amplifying device can do to provide one. The app I used to look at signals in and around my home was one called "Network Signal Info" available free on the Google Play store site for Android based phones. For iPhones, you can dial *3001#12345#*, press "Call" and get a similar function. This information was provided with the Sure Call quick start instructions.To begin, the unit is extremely well built using quality materials. And the performance (when the two antennas are properly placed) is spectacular. In my case, I live in a rural setting and my two nearest cell towers are located about 6 and 11 miles from my home. I use a Samsung Galaxy S5 smart phone which works "most of the time" with no signal booster. That is, I can usually dial out and have the occasional dropped call. Weather can really cause problems with my service, however. I live in a house with a very open floor plan on the main floor and a metal roof. My carrier is Consumer Cellular which uses AT&T towers and the GSM technology. I selected the Omni/Whip version (no directional antennas) as I didn't want to limit my coverage to certain towers or phone locations inside my house.The first thing to know is that you want the outside antenna located in the best signal area (see the tools in the top paragraph) available while providing the best separation between the inside and outside antennas. This separation can be either physical (SureCall specifies a minimum of 25 ft and they supply 50 ft of antenna cable) or electrical. For example, if you have a metal roof and the outside antenna is located above it, with the non-directional vertical "whip" antenna on the base unit on the other side of the roof (indoors), I suspect you could get away with less than the recommended 25 ft separation. With no metal roof it would help a lot to place the inside antenna "co-linear" with the outside antenna, that is, along a common axis, for minimum cross coupling. The reason this is important is that the "gain" or degree of amplification of the unit is automatically throttled back when there is too much "feedback" between the two antennas, greatly impacting the level of performance.So here are some tips: First, try if possible to leave all the adjustment knobs in the fully clockwise location for best performance and "tune" the system for optimum performance through antenna placement. If you have all of the LED's for the various bands flashing yellow, the amplifier is operating within its design range, and you are probably getting some degree of benefit. This doesn't mean, however, you are getting the most out of the amplifier. The single most important thing to remember is that performance is cut back significantly in proportion to the amount of coupling between the two antennas. Directional antennas will greatly reduce this, assuming you don't have them pointing at each other, but the trade off is the restricted field of view for cell towers and a limitation in optimum operating positions for your cell phone. I strongly suspect that most of the reviewers that did not rate this product highly were not aware of these considerations.Finally, Here's what I ended up with after my installation: Without the amplifier in operation, my Galaxy S5 registers -105 dBm (about 1 bar) at the best location inside and on the main floor of the house. With the amplifier switched on, the signal at the phone ranges between -65 dBm (5 bars in the best location) and -90 dBm (two bars at the two worst locations) anywhere on the main floor. I know I could do better by tweaking antenna placement, but I'm quite happy with these numbers, so why bother? For reference, the omni outdoor antenna is sitting on a TV mast 20 feet above the ground, shielded from the indoor antenna by a portion of the metal roof. The base unit with the omni directional antenna is in my basement, just below the level of the main floor, with its vertical antenna angled so as to reflect its transmitted and received signals (from the cell phone) off the inside surface of the metal roof. This is the kind of antenna placement and tweaking needed to get great results from the SureCall (or any other) cell phone signal booster. Be patient and meticulous in your tuning and you will probably be thrilled with the results, assuming you have some level of cell phone coverage now. I'm so pleased I ordered another of these boosters for a friend in a fringe area similar to mine. This person is on Verizon (CDMA) and gets even better results inside my house with her phone than I get with my GSM phone, so I've verified that the SureCall works well with the two predominate technologies used by US carriers in both 3G and 4G modes.And BTW, There was a shipping problem with the first unit and Amazon did a great job of resolving it. Thank you, Amazon!

So far, no improvement. I've tried moving the omni antennae to 2 different locations on the house. No improvement in cell signal strength from the interior unit. Measured signal strength using the Field Test on my iPhone. According to Verizon, they have a cell tower .67 of a mile from my house and several others within a 2-5 miles (signal strength ranges from -114dBm to -88dBm; on phone LTE 1 bar usually and sometimes 2 bars). The cable is 50' long and the interior unit is 3-stories vertically below the omni antennae location so doubt there is oscillation or interference. I will try calling tech support this coming week to see if anything can be done. Perhaps a yagi directional might work. I'm already very annoyed with Verizon and to spend an additional $300 for no improvement is just salt in the wound.Side comment: when I tried working with Verizon on the issues with their cell signal in this dense suburban area, their best recommendation is to use wifi for calls to "boost" the cell signal. Huh? Not making this upUpdate: spoke with very helpful SureCall support. After reviewing my situation, recommended going with the Yagi directional. Going to give that a try. Holding off on changing stars until I see what results (good or bad) are obtained.Also: Verizon apparently doesn't even know where their towers are. i used several different cell tower location websites to locate their towers and found nothing within 3 miles and certainly not in the direction the Verizon customer service rep said. There are several on the West, NorthWest, and North headings within 3-6 miles. My house is on a fairly high hill with a somewhat clear view in those directions so surprised signal so weak for just the phone.

Home located in a poor cell reception area (1 bar) so this product is necessary not nice. Quality product for boosting signal of 4G towers by 1 bar. However, now that cell towers share signals with 5G, is a new product in development that addresses the fact that 5G signal degrades faster with distance than 4G?