Home Technology Mobile & Gadgets World’s Thinnest Foldable Phone Launched: Smart-Tech FoldSlim X1 Measures Just 4.9mm

World’s Thinnest Foldable Phone Launched: Smart-Tech FoldSlim X1 Measures Just 4.9mm

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Smart-Tech FoldSlim X1 Launched: World’s Thinnest Foldable Phone With 4.9mm Design, 144Hz Display
Smart-Tech FoldSlim X1, the thinnest foldable phone of 2026 – (Photo: Social Media)

San Francisco, April 5, 2026

Smart-Tech has unveiled what it claims to be the world’s thinnest foldable smartphone, the FoldSlim X1, measuring just 4.9mm when unfolded, marking a significant advancement in foldable device engineering.

The launch positions the FoldSlim X1 as a strong competitor in the premium foldable segment, challenging established players with a combination of ultra-thin design, high-end specifications, and advanced materials.

Ultra-Thin Design Sets New Benchmark

At just 4.9mm thick when open, the FoldSlim X1 is notably slimmer than many existing foldable smartphones on the market. Even when folded, the device maintains a compact profile comparable to traditional smartphones.

Large High-Refresh Display

The device features an 8.1-inch LTPO OLED main display with a 144Hz refresh rate, offering smooth visuals and improved power efficiency.

A 6.5-inch external cover display allows users to perform everyday tasks without unfolding the device.

Aerospace-Grade Hinge Technology

Smart-Tech has introduced a new carbon-fiber hinge system, designed using aerospace-grade materials. The company claims the hinge can withstand up to 500,000 folds, enhancing durability while keeping the device lightweight.

Advanced Battery Innovation

Despite its slim profile, the FoldSlim X1 packs a 5000mAh battery, powered by next-generation silicon-carbon battery technology.

The phone supports 100W fast charging, enabling rapid power-ups and minimizing downtime for users.

Premium Camera Setup

The smartphone includes a triple rear camera system:

  • 50MP primary sensor
  • 48MP ultra-wide lens
  • 32MP telephoto lens

This setup is designed to deliver high-quality photography across a range of scenarios.

 Pricing and Availability

The FoldSlim X1 is expected to be priced at around $1,699 (approximately ₹1.42 lakh) in international markets.

Pre-bookings in India are likely to begin next week, with availability expected shortly thereafter.

Market Outlook

The global foldable smartphone market has been growing steadily, with manufacturers focusing on durability, battery life, and design innovation. Smart-Tech’s latest offering could intensify competition by pushing the boundaries of thinness and performance.