I know it’s mostly museum computing, but my JollaC still works pretty well. (Admittedly I have never used as my primary phone, but for reading news and similar at home, which probably contributed to its good condition.)
Recently I have noted that there are more and more connectivity problems in Android. I looked with tcpdump and it seems like the TLS handshake failed. So I guess this might have to do with recent Let’s Encrypt changes. Originally announced at Extending Android Device Compatibility for Let's Encrypt Certificates - Let's Encrypt. I understood support for old Android devices has ended this summer.
So do I have any options except retiring the fine device?
Installing an updated root cert? How? I could find instructions for the new AppSupport, but not for the old one. Unless I tested incorrectly it seems that installing a root cert to the native side does not change anything in the Android side.
Because I use the device only at home I could also connect via my own http proxy. But I could not find any way to set a proxy globally. According to instructions on the web adb shell settings put global ... should allow to set a global proxy. I get it working until adb shell, but the settings binary or built-in does not seem to exist in AppSupport. Maybe related to the fact that com.android.settings does not exist either in the old version?
But probably the proxy would not really help. I still need to make it trusted, so I am back to installing a new root cert. Of course I would use either self-signed or Let’s Encrypt. Don’t want to buy a cert.
There is no difference between 4.5 and 4.6. Not overly surprising, the old AppSupport does not get any updates.