I’m a Sailfish user for several years, starting with the N9. Currently I use a Xperia X (F5121). It still works fine with SFOS 184.108.40.206. Adding Android support to SFOS was a great step. But now it’s getting more and more difficult to install newer apps and updates. The API level 19 (Kitkat 4.4) is too old for the most Android apps.
Question: Is there an easy way to upgrade to a newer vendor image/custom ROM/AOSP to support API levels higher than 19?
Example: Would it be possible to flash AOSP image: SW_binaries_for_Xperia_Android_220.127.116.11_r1_v10_loire.img instead of SW_binaries_for_Xperia_AOSP_M_MR1_3.10_v13_loire-1.img (configured in flashing script)?
I read a lot of stuff, but I don’t really catched the relations between Android version, Build numbers and API levels.
Do you have any suggestions? I would like to keep my phone alive.
Thanks for help