Cell Phone Signal Booster Repeater Amplifier for Home and Office - Enhance 2G 3G GSM 4G LTE Voice Calls and Data Signal Kit with Whip and Yagi Antenna. (1700/2100MHz Band 4)

I would like to know if it is possible to change the amplifier for a 1900 Mhz. I brought mine to Argentina and is not working here.

Garbage. Tried two of them and they both didn’t work.