Any particular reason you're not considering, you know, a newer iPhone? Mine's FANTASTIC (an iPhone 5s).
I am not considering that, because I cannot see that it would improve my situation. I use my iPhone 50% for text-messages, 40% for listening to audiobooks, and 10% for everything else. How would a newer iPhone be of benefit ?
Also, I think I asked this before but ... how often do you actually "power down" the device (versus just "sleeping" it)?
Until the last week or so, I powered down no more often than about once a year. I am now doing so every night, in the hope that this will be beneficial.
Thank you for your help.
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