The trend: Ultra-thin smartphones are making a comeback, according to versions seen at Mobile World Congress (MWC) this week in Barcelona.

• The Samsung Galaxy S25 Edge debuted at the show, but the company didn’t release any specs. It could launch as early as next month, per ZDNET.
• Tecno shared its Spark Slim model, a concept phone measuring 5.75 mm thick. It also debuted its Phantom Ultimate 2, which measures 12.1 mm thick when folded twice—thinner than the single-fold Galaxy Z Fold 6.