I just found these images from ddg image search “dual sim”.
The first picture, a Samsung graphic is showing dual sim capabilities by indicating sim1 as a house icon in the system area icons and sim2 is a building.

The second picture is showing a square with a “1” in it. This may be your unknown icon.

edit: i just noticed that your icon is next to the clock (left side - App side). So it could be just a regular app also.

Dont forget to rule out dual sim phones; indicating sim 1 is active.

Even better… old-style trolly cars have independent front and rear brakes. Time it right, lock the back, and pull a skater’s grinder across both tracks. Ride atop on the roof and ring that bell like a Rice-a-Roni promotion until everything wipes-out. 🤙

Builting

My guesses would’ve add: Bolivia… Guangdong Province… Kilimanjaro… a Hammerstein music fest in White Rock, British Columbia.