In this thesis, I explored the use and effectiveness of alternative or custom ROM operating systems compared to stock ones to extend the lifespan of an old smartphone. First, I presented the basic issue of the limited lifespan of smartphones and the potential solution in alternative operating systems. Then, I set the basic conditions that alternative operating systems should meet to effectively extend the lifespan.
For better context, I presented a basic description of the ecosystem of operating systems on smartphones and listed the advantages and disadvantages of alternative operating systems which will be verified as much as possible. Then follows a description of the installation of alternative and stock operating systems with all the tools needed to perform these actions for the easiest reproduction of the test environment.
In the testing chapter, I described the test subject, the Samsung Galaxy Note 4 smartphone, testing methods, and brief descriptions of the alternative operating systems used. This is followed by displays and descriptions of the results obtained during testing.
In conclusion, I provided an assessment of the fulfillment of the conditions set in the introduction and general findings regarding this research. Finally, potential weaknesses of the results and the tests are given, as well as recommendations for further research.
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