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Re:Sxmo: Simple X Mobile – A Pinephone UI that is simple and... by mongol on Sunday May 24, 2020 @06:47AM (#23290661)
This was also present on early Sony phones (1998-ish)

Top left corner here https://youtu.be/htzwTVNfsRI

Re:Sxmo: Simple X Mobile – A Pinephone UI that is simple and... by ptx on Sunday May 24, 2020 @07:00AM (#23290702)
And a bit later (2002-2007) the Sony Ericsson smartphone series based on Symbian: the P800, P900, P910, P990 and P1.