SureCall TriFlex-A AT&T 4G LTE Cell Phone Signal Booster w/ Omni & Dome Antennas | SC-TriAH/O-72-OD-KIT Highest 4G data rate in the industry Supports 2G and 3G voice and 4G data standards on AT&T Network Only LTE, HSPA+, CDMA / WCDMA,GSM,EDGE,TDMA AMP etc. Auto Gain Control (AGC) and manually adjustable dB gain and attenuation FCC certified for new regulations and technical standards