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Samsung sets Galaxy S24 launch for Jan. 17; here’s what to expect
(arstechnica.com)
This is a most excellent place for technology news and articles.
I had android 13 on S5, I wont say it was smooth, but it was more than usable. I replaced it mostly because 2GB off RAM was starting to get on my nerves. I couldn't have more than 2 apps open without it putting to sleep the previous one. Multitasking was not very good on such a old phone.
I cant imagine what could be wrong on 3 year old phone. If it is not broken just install LineageOS on it and you should be good to go.