Any technical solutions to improve my cellphone reception?

Yes, there're various technical solution options available, depending on your situation.

• Wi-Fi calling uses an existing broadband connection and does not need any special equipment.
• A femtocell is an external device that uses your broadband Internet connection to enhance cell phone coverage. It creates a micro cell site inside a building.
• A cell phone signal booster uses the cell signal outside a building and brings it inside where it is then amplified and rebroadcast to the inside of the building.