Post your old cell phone projects or links to ones you know about?
I have an older Samsung Note that I have outfitted with many of these functions. Including 11gb of stored prepping data. It no longer functions for cell phone calls. But still connects to wifi. And is an older unit that still takes back up batteries. Which was once a plus before cheap power banks. I've considered researching the best used or cheap overseas phones for this purpose. Many of the "rugged" cell phones sold by China seem like they might be good candidates. Would be a worthy weekend AI project. Developing a list of key needed attributes and finding the best phones with the best prices for this purpose. And a complete list if functions that might be helpful in a bug out or OAW phone like this.
*The first paragraph of this article about repurposing old cell phones into very capable GPS units - includes links to the authors many repurposing projects involving old cell phones.
"I love tinkering with the bunch of old phones I have lying on the gadget desk. In the past, I have converted Android phones into a dedicated dashcam, a home security camera, and even a baby monitor to keep an eye on my 11-month-old, who is at a stage where she wants to go everywhere. There are dedicated devices for such stuff, but you won't get the processing power and ease-of-use of an Android device. And repurposing old smartphones also saves you money."
https://www.makeuseof.com/i-turned-an-old-phone-into-an-offline-gps-and-it-works-too-well/