With three frequency bands that have independently configurable gain settings to boost 4G, 3G and 2G frequencies, the SureCall TriFlex2Go gives you more control over your call quality and reliability than any other cell phone booster on the market does. It has the most powerful amplifier allowed by law for a mobile signal booster and a high-gain 12-inch antenna with excellent range. With the TriFlex2Go, your call quality is better and your phone's battery lasts longer. For these reasons, it is our pick as the best cell phone booster for rural areas.
Most cell phone signal amplifiers adjust the gain automatically according to the strength of the outside signal, but the TriFlex2Go is one of the only cell signal boosters that allows you to control the gain manually. You can also tune the frequencies to your area or phone. This type of control makes it a great cell phone booster for advanced users. However, it also has an Auto Gain Control setting that automatically does all the adjustments for you, which makes it easy to use for beginners. The SureCall Flex2Go has a similar set of control features, minus the 4G support.
As with all the best cell phone boosters, the amplifier has a max gain of 50 dB. This is the most an amplifier in a car is allowed to boost a signal according to the law. It's strong enough to cover the area of all types of vehicles – sedans, trucks, vans and RVs. It's also strong enough for multiple passengers to benefit from the boosted signals.
One of the downsides of the amplifier is the above-average 5 dB noise figure. The noise figure is the amount of unwanted signals or distortion present within the boosted signal, which can affect call quality. The average noise figure for a cell signal booster is 3 dB. With all the controls, which require more complex wiring and additional components, a higher noise figure is only natural. However, most users won't be able to tell a difference in call quality, so it's not a major issue.
Both of the coax cables that attach the outside antenna and the inside antenna to the amplifier are 10 feet. While this is average for an outside coax cable, most cell phone boosters have a 14-foot inside cable. For most vehicles, this isn't a significant issue, particularly with sedans and trucks if you install the amplifier under the front passenger seat or middle console. However, the shorter cable makes it difficult if you want to install the amplifier in your truck, especially in larger vehicles.
The TriFlex2Go comes with a 12-inch antenna with a 4-inch magnetic base. The large magnetic base allows you to move it easily, but it also gives it the strength to withstand the rigors of driving in all types of conditions.
The outside antenna's average forward gain is 5 dBi, which is among the highest available. This means that it has a longer range than most cell signal boosters do. It's ideal for rural areas where you're further from cell towers. However, the high gain also means it has a shorter peripheral range, which means that it's not good in mountainous areas or areas where physical objects interfere with the signal. If physical impediments are your main signal concern, check out the weBoost Drive 4G-M.
As with all of SureCall's products, the TriFlex2Go comes with a two-year warranty, which is the industry standard. You can contact support through phone, email or live chat. However, we found the live chat feature set to "away" or "unavailable" more often than it was available, even during the middle of the day, which is disappointing. You can download manuals, user guides and articles, which are great resources for learning about how to get the most out of the controls.
The SureCall TriFlex2Go is one of the best cell phone boosters because it has maximum amplification and maximum control. The amplifier has a max gain of 50 dB, which is the most powerful amp allowed by law. You can tune the three frequency bands individually, allowing you to set the gain yourself to boost 4G, 3G and 2G signals, though you can also select the Auto Gain Control feature to automatically adjust the gain for you. It also comes with a high-gain 12-inch antenna that has a long-range ideal for rural areas. Whether you drive a car, truck, van or RV, it's one of the best cell signal boosters around.