At that time, only 400 people used phone service. Today, Marbel has more than 5,000 subscribers. There are three exchanges served by wireless local loop. The company faces interconnection problems. For instance, after deregulation, a lot of duplication resulted.
Some towns have four or five providers.
Marbel also faces gridlock problems. The company has exchanges that do not have interconnection. There are not enough channels for the number of people. Despite its problems, Marbel's development has proven to the government that there are some small areas that are better served by the small operators. So, SunPlus chose to use the wireless technology Supercall 180DX, an inexpensive single channel full duplex VHF radiotelephone.