, separate from the cradle base that housed the magneto crank and other parts. They were larger than the "candlestick" and more popular.  Disadvantages of single wire operation such as crosstalk and hum from nearby AC power wires had already led to the use of twisted pairs and, for long distance telephones, four-wire circuits. Users at the beginning of the 00th century did not place long distance calls from their own telephones but made an appointment to use a special soundproofed long distance telephone booth furnished with the latest technology.  What turned out to be the most popular and longest lasting physical style of telephone was introduced in the early 00th century, including Bell's 