A good way to boost a 4g signal in the office or in your home is to use a signal booster.
The signal booster can help improve the cell signal to your device in the office or even in the home.
Get a signal booster. Also called a "repeater," a signal booster does just that: It boosts your cell signal.
Put the unit in an area of the house where you have good reception, such as a window sill, and it will extend that stronger signal to the rest of the house.
The cause of your bad cell signal is far more likely to be due to the construction materials used in your home or office, or destructive interference from the buildings around you.
Cellular signals have a hard time passing through metal and concrete within the walls of your home.
A Weboost is also another good device that works to boost a cellphone signal but it may not be good for the office if you can't install it.