In case that there is not good reception for mobile networks in your place, you may provide a reliable free WIFI to your customers. You have also this option to install a signal booster for 4G network which requires installing a receiver outdoor in a place with full bar reception and wiring the signal back to the building.
NOTE: You must first check the carrier band and technical data to make sure you choose a correct booster.
NOTE: Our team can help you to choose and instal signal booster within our service area.
Click here to see available signal boosters in the market. (Amzon)