Had to install my phone vendor's software to run the update; there was no linux version I could easily find; so used an old XP laptop. Is very old, does not even have usb 2.0, so any data transfer is slow.
took about half an hour.
it did fail the first time, leaving my phone in a sad "emergency mode" state. Instructions on screen were simple enough:
unplug, remove the battery, and try again.
worked the second time.
notes:
- icons are now more colourful!
- my apps, bookmarks and contacts survived
- home screens did get shuffled, needed to reset them
