How to install minor updates?

privateer42

New member
Feb 13, 2017
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Hi @ all,

I have an Galaxy Express I8730 with lineage-14.1-20170208-UNOFFICIAL-expressltexx installed. GAPPs version is ARM/stock and TWRP 3.0.2-0-expressltexx.
The phone is not rooted. What is the right path for an minor update to a new 14.1 lineage version, whenever possible leaving all apps and settings untouched?

Some users did an dirty update. That means just flashing on top without wiping cache/dalvik - right?
(Should i do a twrp reflash prior update the OS?)

Thanks for your help
greetings privateer42