1 Cor. 13:8 Charity never faileth: but whether there be prophecies, they shall fail; whether there be tongues, they shall cease; whether there be knowledge, it shall vanish away.
The speaking of tongues was a gift given to the Disciples to further the Kingdom of God. In Acts chapter two, the tongues they spoke were the tongues of the people from many different nations, who could not understand. God gave the Apostles the ability to speak those languages(tongues), so those who were present could understand what the Apostles were saying.
Acts 2
1 And when the day of Pentecost was fully come, they were all with one accord in one place.
2 And suddenly there came a sound from heaven as of a rushing mighty wind, and it filled all the house where they were sitting.
3 And there appeared unto them cloven tongues like as of fire, and it sat upon each of them.
4 And they were all filled with the Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance.
5 And there were dwelling at Jerusalem Jews, devout men, out of every nation under heaven.
6 Now when this was noised abroad, the multitude came together, and were confounded, because that every man heard them speak in his own language.
The tongues they were speaking here was their native languages, and not the tongues you "hear" the pentecostals and WoF utter.