•In the early 1980s, the first cellular phones were introduced to the market, and they were far from the sleek, powerful smartphones we use today.
 
•The first cellular phones were large and bulky, with limited functionality and range. They were designed to work only in certain geographic areas, and they were expensive and not widely available to the public.
 
•Fast forward to today, and we have plenty of mobile devices that fit in the palm of our hand and connect us to a global network. Modern smartphones have advanced features such as high-speed internet, GPS navigation, and high-quality cameras. They are also designed to work on multiple bands, making them usable in most parts of the world.
 
•One of the most significant changes between early cellular phones and modern ones is the antenna design. Early phones used large, whip-style antennas that were mounted on the outside of the phone. These antennas were not very efficient, and they often required the user to adjust them manually to improve reception.
 
•Today's smartphones use internal antennas that are much smaller and more efficient. These antennas are designed to work on multiple frequency bands, and they are optimized for the specific radio technologies used in modern mobile networks. As a result, modern smartphones have much better reception and call quality, even in areas with poor network coverage.