2G/Edge on Ubuntu Touch and Android 11, 5G on 13+ and Lineage OS
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I'm able to get 5G on the stock Android 13 and Android 15 from Fairphone without an issue, but if I install the stock Android 11 from Fairphone, I lose 5G and I'm stuck on Edge service (at best).
Installing Android 15 to check if this is a version issue, I'm guessing with the modem firmware, I find that 5G works just fine, and installing the Android 13 stock firmware works fine, as does LineageOS.
Is there any way to identify the exact cause, and resolve it, potentially by using the firmware .bin file from a newer Android OS version, (or however exactly it works)?
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@TheTrench You need to delve deeper into 5G and what 5G is, plus what Android version supports 5G on that device. 5G falls into two categories - 5G Non Stand Alone (NSA) and 5G (SA). 5G NSA piggybacks of the 4G LTE infrastructure end to end in simple terms. 5G SA is full 5G end to end. This can be affected by available networks, service providers, Android versions and vendor BLOBs and device hardware.
You cannot expect newer firmware files to work on an older version of Android without issues or just not working.
I bought a 5G device when 5G was in its infancy and always got 4G LTE indicated and 4G speeds. 5G has a better infrastructure now and it still shows 4G LTE in a lot of cases. My new device is 5G and always shows 5G and is a bit quicker, but not in all cases.
