For the SDR++ software, the minimums are Android 9, OpenGL, and a USB port that implements a good enough version of On-the-Go to be the host controller for other USB devices.
I'll leave it to someone more android savvy to answer if the phone's OS can be bumped up to a more recent version. There are several other software applications that perform the functions of SDR++ and SDR Touch, so even if the Galaxy 3's you have can't run the optimum versions, you might be able to still accomplish the same thing with a different tuner app.
Another approach is to use a different platform, like a Raspberry Pi 4, to be the front end of the radio. They are also pretty cheap devices.
(As a side note.... Raspberry Pi's have become such a handy little gizmo, they are kinda taking over the world. I'm ditching the Lowrance chart plotter on the boat in favor of a Raspberry Pi 4 with a hat to interface to a NMEA 2000 network. The Pi can run an open source chart plotter app called "OpenCPN" wich is every bit as good as the software inside the Lowrance plotter... and the charts are free from the gov. Time to extend my middle finger at Navionics. The little pi will also have GPS and AIS right on the board. These little "hobby" boards are getting really good.)
Thanks for this tidbit. My dad is an Old Timer if you know what those are. He was a PE and an electrical engineer and I have some of his HAM equipment now and have his old license number memorized from when I was a kid. I have the same name as him too! Maybe they won't know if I start broadcasting gibberish like a CB trucker from the 70s.
(* I would never desecrate his soul like that because HAM operators can be picky folks about the specifics of their licensing from what I recall.)
And, I just checked for Raspberry PI 8GB and they are now in stock!
Yay! I haven't checked on those for a long time. They were hard to find for awhile a year or more ago. I need to buy a few for logging live data transmitted from Motec and Aim logging devices and the ECUs on cars and they were getting harder to find.
Load up now folks before Taiwan is invaded. Raspberry PIs can be very useful tools for a lot of things if you know what you're doing. And the prices have come down from over a year ago. Not quite what they were, but closer to pre-Covid. Combine a PI with a Cradlepoint and you can have a very useful, small device to be used almost anywhere. You can get a Cradlepoint on Ebay cheaper, or look for some of the alternatives. They're great systems for remote locations off in the sticks. Cradlepoints are used by first responders and a single device can power a lot of internet traffic from many devices.
Do you know if the app will run with much earlier versions of Android? I have a couple old S3 Galaxys in search of a good time.
I have a a couple of older Note 4s that still have the removable battery. Still a useful phone today somewhat. I think it runs somewhere around Android 6.1.
I think you might need to root your phone and maybe try a hack to get a newer OS installed. It has been a long time since I looked into that. But, if you go to the Wayback Machine, you might find some workarounds to get a newer OS installed on an older device like an S3 If it's a spare phone, just Root it. Just be certain you follow the instructions VERY well Rooting it and don't be drinking beer or you might have a boat anchor when you're done. The upside with a rooted device is you won't have the bloatware and you'll have full access to everything regarding your phone. But you do need to be tall enough to get on the ride working with a rooted system, but there's plenty of help online for that if you're patient. Using a PC to access phones can be very helpful using ADB below. In fact, I think you will need it to root your phone if you go that route.
Find out about the Android Debug Bridge, a versatile command-line tool that lets you communicate with a device.
developer.android.com
FYI, this tool above requires you to make commands from the command line though.
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@Bobster
Edited:
I did find an article you might check out.
Let me know if you make headway. I may update an older phone if you are successful.
Now you can run Android 12 on the decade-old Samsung Galaxy S III (but you probably shouldn't)
liliputing.com
Link=Icom IC-2300H around $200+ ish.
