I'm the guy that used his S2 till it broke and now I'm using an Xperia that's reaching 6 years in 2 months. I don't use my phone for anything else then messaging and browsing. Both phones worked flawlessly and battery life degradation is almost unnoticeable. My Xperia can now run only 1.5 days instead of 2. No problem when it's charging every night anyway.