Ookla: Foldables Deliver Faster Speeds but Run Hotter

Ookla Speedtest compared foldable and slab phones with similar chips: foldables posted higher mobile download and upload speeds but also higher temperatures. The Galaxy Z Flip 6 ran the hottest, while the Galaxy Z Fold 8 and Z Fold 8 Ultra exceeded their predecessors' battery temperatures. Foldables account for just 1.4% of smartphones in use, with sales expected to grow 20% in 2026.

• Foldables beat slab phones in mobile download and upload speeds
• Galaxy Z Flip 6 recorded the highest temperatures in testing
• Z Fold 8 and Z Fold 8 Ultra run hotter than their predecessors
• Foldables hold 1.4% of the market, sales to grow 20% in 2026