My first smartphone, a Palm Treo 600, lasted from 2004 through 2009. It still works, but the battery is seriously degraded. What's worse though is that by the time the phone tries to warn of a low battery, there isn't enough charge left to announce the problem!

I looked into getting a new battery, but discovered that the Treo 600 was considered obsolete and thus good new batteries weren't available. I also discovered that Palm was ditching their venerable PalmOS - i.e. the company was commiting seppuku.

I ended up eBaying several of the last PalmOS Treo's - the 750. I'm now on the second one because the audio jack broke on the first one.

The Treo 750 is about the newest smartphone that Verizon will allow on their network without a data plan. Me need is just for a dumb phone and a PDA, hence I haven't gotten anything newer. I also won't put up with the horrid user interface of a "numeric keypad only" phone - writing the Great American Novel via the equivalent of Morse code was a cool thing 20 years ago, but not anymore.