The boosters are not magic. They do extend available service. They also sell 120ac adapters for the house or using while connected to shore power. Altitude helps the external antenna. On my truck and Jeep I have found the middle of the hood the best spot for the 4" rubber antenna.
They also sell home specific units. Those devices light up an entire room. A friend needed one for on call work emergencies. He went from no in house service to reliable 3g/4g anywhere in the living room. He placed his mifi next to the internal antenna. Then wifi to his computer.