I, too, am interested in the question of international cooperation for a publication on mobile customer behavior. A lot may have changed in recent years regarding mobile customer behavior. The pandemic of the SARS-CoV-2 coronavirus (Covid-19) may have changed and increased the scale of mobile customer behavior, which is related to the increase in the level of digitization and Internetization of economic processes, the activities of businesses, companies and financial and public institutions. During the pandemic, the scale of consumer purchases of various types of products and services via the Internet increased. Due to government-imposed quarantines and lockdowns, some citizens who had not previously made purchases via the Internet began to do so. Also, many companies in the SME sector have set up websites for their business operations and online platforms for selling product and/or service offerings that were hindered or blocked from being sold in traditional form by the lockdowns imposed by the government during the pandemic on selected sectors of the economy. Sales of some product and service ranges have even increased several times thanks to the Internet. This has accelerated the development of e-commerce, e-logistics, e-banking, payments and settlements made online. The development of online and mobile banking has accelerated. Many companies have increased investment in the implementation of new information technologies and Industry 4.0 into their business operations in order to increase the scale of its efficiency and adapt to current business trends. The scale of shopping and use of various information services by citizens from a smartphone has increased. Also, public offices and institutions have increased the scale of service to citizens via the Internet in terms of communication conducted remotely, sending documents electronically, and handling official matters remotely. As a result, there has been an increase in the digitization and Internetization of public institutions, where citizens can already perform all or almost all of their official matters via the Internet. Also, there has been an increase in the development of smartphone applications through which citizens can use various online information services. The use of social media on smartphones by citizens, including young people and children, may have also increased. Unfortunately, there were also negative effects, which was a significant increase in the amount of time spent by children and young people using social media and computer games on smartphones and laptops. This may also have been related to the increase in the scale of education delivered remotely during the pandemic through online video conferencing platforms. A negative aspect could be a decrease in the scale of the necessary social interaction of children and adolescents, play carried out with peers, teamwork carried out at school, interaction and cooperation in a group of peers i.e. key factors for proper social development, formation of group work skills, social skills in children and adolescents during their development and education. In view of the above, the issue of changing the behavior of mobile clients is a serious and multi-faceted problem. I am conducting research in this issue. So I am eager to join the international cooperation on the publication on mobile customer behavior. Some of the results of my research have already been published in articles that, after publication, I posted on my profile of this Research Gate portal.