Knowledge Sharing means education of the illiterate adults through smartphone applications. It is managed by private and public organizations. In Bangladesh primary education has not been made compulsory before. In the past also due importance was not laid on it. As a result, a large portion of our population could not receive primary education.

At present more than 80% of the school-going children do not attend primary school. So the number of illiterate adults is increasing day by day.

Education is the backbone of a nation. More illiteracy means more ignorance in the laws of the country. The progress of the country is next to impossible if a large number of people are left ignorant. So adult education is necessary. It is necessary to give the illiterate the knowledge of 3 R’s Reading, Writing, and Arithmetic.

It is the bounden duty of the literate especially teachers of primary and secondary schools to start night schools in their respective areas. The college and the madrasa teachers also have parts to play. The student of all the institutions can help in executing the program of removing illiteracy.

Illiteracy is a curse and the only govt cannot do everything. Wholehearted co-operation from all quarters is essential to attain success in removing illiteracy.

Everybody knows that wireless communication technologies have become widespread all over the world. In 2006, 90.9% of people in developed countries and 32.4% of people in the developing countries owned a cellular phone. Many people are mobile phone subscribers and own devices such as mobile telephones, digital cameras, personal digital assistants, and laptops that are enabled with wireless fidelity. One of the most important characteristics of laptop computers is wireless network access as the computer technology was developed extensively in the 21 century As the result, people relation slip and communication became more complex and to contact with each other, they use different devices ( such as smartphone, Tab). In this regard, some researchers. Some believe that people communicate with their family and friends using their smartphones and cell phones as well.

Some also claimed that nowadays smartphones have changed to a mechanism in personal communication. The researcher in a study on university students of Bangladesh showed that the students are the most users of smartphones, and they are busy using smartphones a lot of times daily.

As most classroom activities are done by teachers, to form any task and process in class, they need to utilize specific procedures suitable to deal with those activities and tasks. Teachers use difficult procedures in teaching and training in classes -such as teaching through smartphones. In this case, many experts in the field strongly believe that smartphones are cheap and their abilities are high comparatively. Some researchers believe that people use smartphones. since they are easy to use and they are available to meet the purposes and abilities needed in any time and any place since they are useful computers to carry in their pockets

Functional elements of smartphones from researchers' functional elements of mobile phones are comfort, tranquility, counsel, and speed. Another researcher also believes that the smartphones that have the facilities can be used to enhance teaching and learning through access and connectivity to the internet.

At present Bangladesh, students send messages, use digital cameras and video recorders for learning through smartphones. Teachers note reviews and studies done in this field show that smartphones have the main role to help people in learning and training and the motivation and the interests of learners can be increased through smartphones.

As the youths ages spend a lot of time using smartphones and it’s a source to spend their leisure time, it can be used to acquire their highly purposeful education. For this reason, some universities such as Dhaka university uses the most available facilities from smartphones and finding out new teaching procedures by the active use of mobile phones.

The students enjoyed smartphones and help them to learn new terms and knowledge sharing. They also found that mobile phones are used as an educational tool to help students with academic success. A time-saving feature is the short message system because users can send text messages and in return, they can read them again.

In this regard text messages via cell phones as a learning tool, whether sending educational texts via cell phones in education has positive effects or not, many different studies were done. Some of the positive effects of mobile phones are pointed out. Improvement of learning and increasing understanding of difficult concepts; Completion of teacher training, Satisfaction of needs, abilities and interests of learners; Improvement of critical thinking skills; Constructive use of time and preventing from the waste of class time (as the result of teacher’s absence or delay). SMS (short message service).

One researcher believes that sending text messages via cell phones as a learning tool has negative effects on learning, some of them are as follows. Sending short messages in class time; Sending or receiving test answers; Annoying others; Extra charge for a teacher; Dealing with educational problems caused by forgetting to bring mobile phones; loss of learning styles, needs, abilities and interests of learners; Delaying in transferring and receiving messages due to network outages Discussion and

Finally, we want to say that recent development in software and hardware, qualities let teachers grow and manifest the student's abilities. smartphones are one of the technologies that people use to communicate with each other and at present smartphones are cheap, extreme interests of students in utilizing them result to facilitate learning.

Also, there are several reasons to use cell phones in education and learning,  especially language learning that is the most important. Communication via mobile phones is a collaboration tool that facilitates appropriate and proper social relations with learners. Students can exchange information at any time an, in any case, sending text messages through smartphones sharing knowledge is very essential for students at all.

But It is also remembering that there is some disadvantage also such as sending short messages in-class time, sending or receiving test answers, annoying others, extra charge for the teacher, dealing with educational problems caused by forgetting to bring mobile phones, loss of learning styles, needs,  abilities, and interests of learners and delaying in transferring and receiving messages due to network outages.