According to wireless providers, the large cell towers, known as "macro" towers, are congested and can't meet the current and immediate future needs of their customers.
To increase the coverage (how far the signal reaches) and the capacity (access to the data), wireless providers are installing small cells. These antennas cover a smaller area (a few blocks) and are usually connected by fiber optic cable providing additional capacity at faster speeds. This technology will reduce the load on the larger cell towers and enable mobile devices to work as expected.