evolution of instant messanging (IM) applications

1. influences of the applications

1.1. closer to friend?

1.2. spend more time?

1.3. spend less time?

1.4. creating more misunderstandings?

1.5. avoiding more misunderstanding?

1.6. spend more money?

1.7. save more money?

2. types of the IM applications

2.1. skype?

2.2. whatsapp?

2.3. wechat?

2.4. snapchat?

3. the change of IM application

3.1. less expensive?

3.2. more expensive?

3.3. fast?

3.4. slower?

3.5. more convenient?

3.6. simple?