Pros / You can control the frequency bands and gain.

Cons / It doesn't support 4G networks.

 Verdict / With independently reconfigurable bands and manually adjustable gain, the SureCall Flex2Go provides control that you don't find in other cell phone boosters. It simply lacks 4G support.

The Flex2Go is one of the few cell phone boosters that SureCall makes for vehicles. The hard metal casing, which houses the amplifier and the dual internal CPU, gives it one of the most durable builds among the cell phone boosters we reviewed. You can install this in your trunk, under a seat or in the glove compartment. It has the most powerful amplifier for a vehicle cell phone booster allowed by law, but it lacks 4G compatibility. If you need a device that does support 4G, try the SureCall TriFlex2Go.

The best feature of the Flex2Go cell phone booster is the amount of control it gives you over the frequency bands and the gain. You can tune the two frequency bands, 800MHz and 1,900Mhz, to adjust specifically to the strongest signal available or to the frequency your phone uses. You can also manually adjust the gain. However, so much control can also be a problem if you're a novice. For this reason, it has an Auto Gain Control setting that adjusts the gain automatically according to the strength of outside signals, which is how most cell phone signal boosters operate.

The cell phone signal amplifier has a maximum gain of 50 dB, which is the highest allowed by law for a vehicle device. This gives it the necessary wireless range for sedans, trucks, vans and RVs.

The biggest downside to the Flex2Go is the lack of a 4G frequency band. The two frequency bands boost 3G and 2G frequencies. It also has an above-average noise figure of 5 dB, which means that there's more unwanted noise within the amplified signal than there is with most cell phone boosters. For example, the weBoost Drive 4G-M has a noise figure of 3 dB.

The outside antenna is 12 inches. It's omnidirectional, which allows it to receive signals from all directions, and it has a high forward gain of 5 dBi. Most cell phone booster antennas have a forward gain of 2.62 dBi. This means that the Flex2Go's pickup range is much longer than average, which makes it ideal for rural areas where fewer obstacles block the signals.

SureCall Flex2Go Visit Site
  • Max Gain
  • Noise Figure
  • Frequency Bands
  • Outside Coax Cable Length
  • Inside Coax Cable Length
  • Antenna Height
  • Antenna Gain
  1. This is the most a signal can be amplified by the device.
    dB (Higher is Better)
  2. 5  SureCall Flex2Go
    50.0 dB
  3. 50.0 dB
  4. 50.0 dB
  5. 50.0 dB
  6. Category Average
    46.38 dB


The SureCall Flex2Go is one of the few cell phone boosters that gives you complete control over the frequency band tuning and gain, though you can just as easily set it to adjust automatically. It has an amplifier with a 50 dB maximum gain, which gives it the range to cover all types of vehicles. The biggest difference between it and the best cell phone boosters is its lack of 4G compatibility.

SureCall Flex2Go Visit Site

Specifications and Benchmarks

Installation Features

Wireless or Cradle
Outside Coax Cable Length (feet)
Inside Coax Cable Length (feet)
Approved by All Major Cellular Providers
Car Coverage
Truck Coverage
Van Coverage
RV Coverage

Help & Support

2 Years
Live Chat

Signal Boosting Performance

Max Gain (dB)
Noise Figure (dB)
Frequency Bands
4G Data Enhancement
3G Data Enhancement
2G Data Enhancement
Multiple Caller Support


Weight (ounces)
Height (inches)
Width (inches)
Depth (inches)

Antenna Features

Outside Antenna Height (inches)
Antenna Base Diameter (inches)
Average Gain (dBi)
Magnetic Mount
Vertical Polarization