Android phone to function Only As A Camera

I2K4 wrote:

You might look at Open Camera , which has both homescreen and lock screen widgets and will probably help pull the most out of an older phone's limited camera:

Widgets and tiles

Open Camera comes with a "Take Photo" widget. You can place this on your homescreen. When clicked on, it lauches Open Camera and takes a photo immediately.

Open Camera also comes with two widgets that can be displayed on the lock screen (requires Android 4.2 or later - but lock screen widgets are no longer available in Android 5 or later). The "Open Camera" widget launches the app; the "Take Photo" widget will also automatically take a photo. Note that if you have a PIN lock etc, you'll have to unlock even if "Show camera when locked" is enabled.

In the unlikely even the Android version is earlier than version 4, there are APKs for older versions of the app available from reliable download sites outside the Play Store. I can't recall the screen launch functionality of the older versions. You might also look at Hedgecam2, a collaborative spin-off of Open Camera with a different user interface.

{By the way, these old phones, especially if they have microSD storage, can be very useful without sim cards as "MP3 players" for music or audiobooks, and for offline sat/nav using Open Streets Maps clients or similar, and wifi access to browsers or VOIP services. Spares the battery on the regular phone, uses well beyond those of a pocket point&shooter.)

thanks so much