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Cellphone-Mate 65db Adjustable Gain Wireless Amplifier- CM-EFLEX-65 [800/1900mhz] - DISCONTINUED

No Longer Available

Item Number: 3953



Sales Tax (?):

$0.00 tax collected outside of Illinois


This amplifier has been discontinued and replaced by the FlexPro

Fast Facts About This Product:

  • This amplifier is best for: Users who need to provide amplified cellular signal to multiple cellular modems or phones in a home or office up to 5000 square feet and have the space to accommodate the 50' of separation between the outside and inside antennas that this kit requires.
  • Coverage area*: 1,000 - 5,000 square feet
  • All-in-One Kit? NO - antennas and cabling are required (sold separately)
  • Compatibility: 800mhz/1900mhz networks, which are used by most 2G (voice) and 3G networks in the USA, including:
    • Verizon 2G/3G
    • Sprint 2G/3G
    • AT&T 2G/3G and HSPA+ (which shows up on your device as "4G" - NOT LTE)
    • T-Mobile and Cricket voice only
    • Does NOT work with LTE for any carrier or AWS (T-Mobile 3G/4G)

IMPORTANT SIGNAL INFORMATION: If you're purchasing an amplifier for use at one specific location, we strongly recommend doing a site survey first to determine whether the amplifier will help you and to give you an idea of what kind of results you can expect from it.

If your signal is extremely poor (-108db or worse), an amplifier may not be effective - there must be some usable signal available for the amplifier to boost. Conversely, if the signal is too STRONG at your location (-50db or better), the amplifier may shut down to avoid interference with the tower.

The Flex 65 cellular booster with adjustable dials allows you to optimize cellular coverage in your home or in your office where reception is weak due to topography, building materials or structural design. Part of Cellphone-Mate’s Enhance line of personal consumer and SOHO boosters, its compartmentalized design ensures enhanced call clarity for multiple users.

How it works: The outside antenna (sold separately) picks up the cellular signal and sends it through a cable (sold separately) to the amplifier. The signal is then boosted and sent through a cable (sold separately) to the inside antenna (sold separately), which rebroadcasts the boosted signal. All of your modems/phones within range of the inside antenna can benefit from the boosted signal wirelessly.

*Many factors will influence the actual coverage area you will see from a repeater, including layout/floorplan, construction, and original un-amplified signal strength. Depending on your situation, you may see more or less coverage than the estimates listed here. It is not possible to guarantee coverage area.

Installation diagram:

not to scale. representative graphic only. amplifier does NOT include cabling or antennas.

Installation notes:

  • In order for your system to function properly, you must maintain adequate separation between the outside and inside antennas (if the antennas are too close together, there will be oscillation/feedback between the antennas and the amplifier will shut down). This amplifier requires approximately 50' of separation between the outside and inside antennas (if you are using an omnidirectional antenna as the outside antenna, you will need more separation than directional antenna users will need). Separation can be horizontal or vertical.
  • If you cannot achieve adequate separation to eliminate oscillation, you can turn down the gain on the amplifier, but that will result in a smaller coverage area from the amplifier.
  • The interior antenna should be at least 10' away from the amplifier.
  • If you are using a panel antenna as the interior antenna, make sure it is aimed AWAY from the outside antenna.
  • For more details, you can download the installation manual (PDF)


  • Frequency Range: Uplink: 824-849/1850-1910 Mhz; Downlink : 869-894/1930-1990Mhz
  • Standards Supported: CDMA, WCDMA, GSM, EDGE, TDMA and AMPS etc.
  • Gain: 65dB Cellullar (max 67) / 65dB PCS (max 67)
  • Max Output Power: 3watt Cellular, 2watt PCS EIRP
  • Impedance: 50ohms
  • Noise Figure: Maximum 5 dB
  • VSWR: Less than 2:1
  • AC Power Transformer: Input AC110V, 60Hz; Output DC12V/6V
  • DC Power: 12V/6V
  • RF Connectors: N Female on both sides
  • Power Consumption: <20W
  • Auto Shut Off: Yes
  • Operating Temperature: -20° to +70°C
  • Dimensions: 5.5” x 4.75” x 1.25”
  • Weight: 1.2 lbs

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All Reviews (8)

Only customers who bought this item from 3Gstore can write a review - these are all verified 3Gstore purchases

Date Added: 04/09/2014 by Andrew S. (Bumpass, VA)
This unit does very well for cellular phone reception. I would say about 30% of my house now has complete phone coverage. That being said there is NO noticable difference in data bandwith gain or latency like I was hoping for my Sprint OverDrive Pro - it is actually worse. If you have Sprint 3G coverage do not expect the amplifier kit to boost anything for this device. If I would have known this I would not have bought the 500 dollar kit. Unfortunately 3G Store has the OverDrive Pro listed as a compatible device that will boost the signal:
"Repeaters for Overdrive Pro Show All3G Only4G Only - A repeater is similar to an amplifier, but instead of only boosting the signal for your Overdrive Pro, it works wirelessly to boost the signal to multiple cellular devices. "

3Gstore Comments:
This product DOES work for Sprint 3G - but it does not work for 4G WiMAX (this is stated in the specs). Perhaps you have the two mixed up? Feel free to contact our tech support for additional help!

Date Added: 04/02/2014 by John J. (Grand Bay, AL)
Works great! My son says the only thing bad about it is that "it works so good his phone can not decide to go through his cell connection or WiFi!" LOL!

Date Added: 03/05/2014 by Jerry M. (Austin, TX)
Powerful amp (noticeably more powerful than the previous Wilson amp offered for this level). And if that is too much power for your situation, then it can be dialed down to as small an application as a truck or automobile cell-phone amp. LEDs on the face let you know if you don't have enough separation between the external and internal antennas. Placing the interior antenna on one side of the house still permitted good cell and data signal on the opposite end of the house. I bought this with the full kit, which included the higher-quality cables than I've used in the past, and the external antenna came with all the hardware I needed to mount it on my own mast. I highly recommend this.

Date Added: 12/26/2013 by Mark C. (Easton, MD)
I had an indoor cell signal from 1 to 2 bars before installing this system, after the install I now have a 4 to 5 bar signal with no dropped calls. This has allowed me to cancel my Verizon land line at $60.00 a month and install the Verizon Home Connect service which allows me to keep my home number but uses Verizon Wireless as a carrier @ $24.00 a month with all of the same home phone services & features. These savings will pay for the cell booster system in less than a year.

Date Added: 05/15/2013 by michael k. (standish, MI)
working great just like i thought it would.

Date Added: 03/22/2013 by Kim S. (Cypress, TX)
I don't usually write reviews but felt this one very worthy. This was extremely easy to install with the additional components we purchased. We have 4800SF metal building and had NO cell reception inside for 5 years. Wish I would have known about this sooner. As soon as it was hooked up we all had full bars, no matter where we were inside the building. The owner made a comment yesterday that he actually walks inside the building to make cell calls now because he has better reception inside than standing outside. Great customer service at 3G.

Date Added: 01/07/2013 by Paul S. (Franklinville, NY)
I purchased the entire kit for my house that is very rural. I was lucky to be receiving 1-2 bars on my AT&T phone (still only 2G where I live) and this boosted my signal to 4-5 bars (still only 2G....but this is an AT&T thing more than anything). I also have a Verizon MiFi that was getting about 2 bars of 3G and this amplifier system boosted the MiFi to a solid 5 bars on 3G.....this will save me from having to spend the $$ on satellite internet. Of course 3G data is a step up from dial-up, but I'll take it with this booster over having nothing at all. I thought I was going to have to switch cell phone service since AT&T isnt all that wonderful at my new house, but this boosts the signal enough to make it worth keeping it since Im not a fan of all the "share everything" plans....Im grandfathered into a cheaper phone plan and Im happy I can now keep it!

Date Added: 01/06/2013 by Donny W. (Ashland, NE)
all of the equipment works great. thank you. my mother says it's the best Christmas present ever! she's very happy now her cell phone works

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We recommend downloading the installation manual (pdf) before ordering.

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