[General Questions and Answers] SultanGris:
forgive my ignorance, heres some background info. Ive been using android for a long time but not very technically knowledgeable about the OS but I think its time i learn some stuff. Im far more knowledgeable than the average PC user about most hardware and software so I dont think it would be too hard to pick up some power user android tips/tricks. Only reason I havent done so yet is cause the stock version has always worked great for my needs so far but im starting to have some issues now. I fricking HATE forced OTA updates as they most often fubar my phone after they install. Ive never rooted, thought im starting to look into doing so as it may be beneficial to my needs. I currently have a samsung galaxy note 3 on verzion with unlimited data which i pretty much only use as a wifi hotspot device, upwards of 250 gig a month for about 6 months of the year to stream HD video TV shows and as my main internet source while i travel and a samsung galaxy note 4 on att with 30 gig a month data allowance which i use as my main mobile phone/tablet device needs. In my experience ATT sucks a fat one with very sporadic data speeds and successful call rates even with 4-5 bars of 4G LTE signal which varys from non existent to moderate at best wherever i go. Verizon is 2x as fast as atts top speeds consistently with no wavering in speeds anywhere and with equal signal verizion is always at least 2x faster than att wherever ive tested them so far. id throw the att at a brick wall and only use verizon except for the fact verizon has zero coverage where i live most of the time.

Anyways back to the main topic question, I have a DJI Inspire 1 quad copter and use my att samsung galaxy note 4 phone to view the camera as i fly and run the DJI Pilot app. I hate and do not want to use the updated app version as it removes features and adds unwanted restrictions and I was wondering if someone could tell me how I can copy the app apk file I think its called? from my phone to my pc to preserve my current version of the app and install it later to a different device or my same device after a factory reset if ever necessary. I dont not want to lose the current app version that im running now. Its since been updated on the google play store so you can no longer the the version im currently running from there. Is this possible without being rooted from a samsung galaxy note 4 running android version 5.0.1 on att? I may have the same app version installed on my note 3 on verizon running kit kat i think, and maybe even an older att note 2 running an even older android version, not sure which, but its on the OTA update that fubared the note 2 on att.

oh and one more question please, my note 3 on verizon has downloaded another OTA update and keeps asking me to install which i keep postponing cause i use foxfi for my hotspotting needs and am scared the OTA update will screw that ability up so i dont want to install it. Its working perfectly for what i want to use if for right now so no reason to update in my opinion. Is there any way to delete this OTA update file and get it to stop asking me to update every time i use the device?

any info appreciated, thanks a million!