The solution is to stop all background apps on the phone! This can be done by pressing the !!! screen button (lower left), then tap the # active in background text at the top, and stop them all. Essentially one wants as little as possible competing for CPU time with the Victron Connect App during a firmware update.
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Just found that updating the BlueSmart IP65 12/15 firmware from a Samsung S20 Android phone failed every time mid-update.
Both chargers were inoperable afterward. However, using a Samsung S10 phone instead worked – Although both chargers had an update fail message at about 93% despite the firmware update actually being successful
I’ve used this same Samsung S20 phone for earlier updates without issue, and both phones software are up to date.
Any ideas? Can an Admin here report this to Victron?