Difference between Phone and Chat

Parameter	Phone	Chat
Description	A telephone, or phone, is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be heard directly.	Chat is a kind of communication over the Internet that offers a real-time transmission of text messages from sender to receiver. Chat messages are generally short in order to enable other participants to respond quickly. Thereby, a feeling similar to a spoken conversation is created, which distinguishes chatting from other text-based online communication forms such as Internet forums and email
Requirements	Telephone Number is Required from telecom service provider.	Email Address is Required (Digital Address) from valid mail server uses a program called Internet Relay Chat (IRC) that runs on an IRC Server.
Easiness	it is true that talking is, for most purposes, easier than writing	Generally more difficult than, talking because writing tends to occur under conditions which make it more difficult to know what to say and how to say it.
Problem	No. of connections that you can make is limited (Call Conferencing).	No Connection Limited and Unlimited chat connections are allowed.
Example	Audio Call Video Call	Audio Chat Video Chat