Recommend some books about smart phones. I am interested in the knowledge of smart phones. Can you recommend some books?

Digital communication magazine is published twice a month. The first half is digital (including mobile phone knowledge), and the second half is all mobile phone knowledge. A copy of 10 yuan is available at newsstands in big cities. The website of their company is 18900 mobile phone network.

This is the first book about mobile phone knowledge that I have come into contact with. It is also through this book that I learned a lot about mobile phones. Hope to adopt! thank you