CM700A 70dB | AT&T 4G LTE Signal Booster for Home and Office

70dB ( AT&T LTE Band ) | Wireless boost signal up to 20,000 sq. ft.

  • Single Band 700 MHz – (4G AT&T LTE Band)
  • 70 dB Avg. Gain, 75 dB Max Gain
  • Improve data rate speed up to 20,000 sq. ft.
  • Independently adjustable uplink and downlinks
  • Supports multiple users
  • Sophisticated power control ensures output power is 3 watts maximum (max allowed by FCC)

The SureCall CM700A 70dB is the first 4G LTE amplifier on the after-market dedicated to improving Internet and data service on the AT&T LTE network. This amplifier is designed for homes, offices and warehouses operating on the LTE 4G frequency where users currently are not getting a 4G signal due to locale, building materials, structural design or where the signal is weak. Covers up to 20,000 square feet.

Package Includes:
▪ 4G booster
▪ AC power supply
▪ User manual
▪ Velcro and screw mounting kit

Outdoor and indoor antenna and 2 cables are required for installation (purchased separately).







Frequency Uplink: 698-716 MHz ; Downlink : 728-746 MHz
Average Gain 70dB LTE
Maximum Gain 75dB
VSWR ≤2:0
Standard Supported LTE
AC Power Transformer Input AC110V,60Hz; Output DC 5-15V
Maximum RF Output Power 3 Watts EIRP
Noise Figure 5dB
Cable LMR400 or CM400 recommended
RF connectors N Female connectors on both ends
Power Consumption <10W
Dimensions 6” x 4” x 2”
Weight 1 lb 13 oz
VSWR >2:1

Note: Our boosters and amplifiers cannot transmit cell signals without an outside and inside antenna connected by a cable.

We strongly recommend these antennas and cables as accessories for our boosters and amplifiers.

However, the number of antennas, length of cable, or connectors needed can vary according to the size and make of the structure, lack of signal strength, or where the structure resides. Or you can contact us or our reseller to find out what you need.


Full Band Outside Fiber Antenna


Full Band Inside Dome Antenna


 Ultra-Low-Loss Coaxial Cable  



  Full Band 2,3 or 4 Way Splitters   

The signal is received by the outside antenna from the cell tower, then AMPLIFIED and transmitted to your phone through the inside antenna. When the phone transmits, the signal is received by the inside antenna, then AMPLIFIED and transmitted to the cell tower through the outside antenna.

1. Mount outside antenna (mounting kit with stucco screws provided)

2. Using CM400 cable, connect the dome antenna to the side of amplifier marked OUTSIDE

3. Mount dome antenna on the ceiling

4. Using CM400 cable, connect the dome antenna to the side of amplifier marked INSIDE

5. Connect the Power Cord (make sure the booster’s power switch is in the OFF position).

6. Turn on the booster’s power switch. The LED light will glow, indicating that the booster is ready to use.

7. Adjust dipswitches per the user manual’s instructions for ideal reception