Also, does the last option work if I were to upgrade to 22.214.171.124? My understanding is that this firmware fixed some bugs in 126.96.36.199.
Thanks again for you input.
Many prime benefits are available on non-FireOS devices including:
- prime video (streaming only; can't download content)
- prime music (full functionality including download)
- Kindle books/magazines (but can't loan/lend; no freebies)
- all non-electronic services (eg: free shipping)
I have great luck with the Nexus variants by @ggow. I also use CM11 on an older Fire tablet; no complaints. However, Nexus remains my favorite.
With 188.8.131.52 you have several paths:
- rollback to 184.108.40.206, unlock bootloader, install TWRP and then flash Nexus or CM (runs natively)
- upgrade to 220.127.116.11, root, install Safestrap v4 and then flash either Nexus or CM. However, once you upgrade you can no longer unlock your bootloader which carries other benefits including the ability to run custom roms natively and more robust recovery capabilities should something go wrong.
- remain on 18.104.22.168, install Safestrap v3 and then flash Nexus v1 to a secondary slot. This option gives you the best of both worlds as you can boot into FireOS (for prime content) or Nexus (for for access to all things Google). However, both roms are Jelly Bean based which is two generations back from Lollipop.
The first path is preferred but more complex. The last is easiest (and least risky) but is an older solution with aging roms. The middle choice is primarily targeted at newer devices that can not roll back or unlock the bootloader (plus reduces your future options). You'll need to decide which is best for you.