A transparent iPhone Air with a working SIM slot looked like a hardware hack for the ages, but it also showed exactly what got sacrificed when factory design margins disappeared.
In a new video, YouTuber Linzin took viewers on a 22-minute journey through Huaqiangbei, China's famous electronics market. There, technicians worked their magic by laser-stripping the rear glass of an iPhone Air for a see-through effect.
They didn't stop there and milled space for a SIM slot directly into the frame. They also handled delicate board-level microsoldering to make the eSIM-only iPhone Air work with a physical SIM card.
The modified phone powered on, connected to a carrier, and worked just fine. It did run hotter under load and lost its water resistance.
The hacked iPhone Air also had slightly degraded haptics, and eventually needed repair because the microphone ribbon came loose.
Turning the iPhone Air transparent
Technicians started by using a laser to remove the internal paint layer behind the rear glass, which revealed the internal components. They made sure to preserve the MagSafe magnet ring and camera trim during the process.
Internal graphite thermal sheets were removed during the process. Those sheets normally spread heat from the system-on-chip and battery across the chassis.
After reassembly, stress testing showed higher operating temperatures. Apple's thermal layers were designed to maintain performance and long-term reliability, not to showcase internal hardware.
Transparent iPhone mods had been around in Shenzhen for years, often called "Explorer Edition" conversions. Apple had never released a clear-backed iPhone, and the internal parts weren't set up to be seen.
Adding a physical SIM slot to an eSIM-only design
The iPhone Air didn't come with a physical SIM slot, so it used eSIM technology instead. To add a SIM tray opening, you needed to make a more complex modification to its ultra-thin frame.
Technicians carefully put the phone into a CNC milling machine to make a precise cut in the metal chassis. However, milling close to antenna lines and structural parts could pose risks to signal and durability.
The thin chassis meant the original Taptic Engine had to be removed. A smaller linear motor took its place, and Azhe estimated it worked at about 90% of the original's performance.
Apple's Taptic Engine was pretty big because it needed mass and precise tuning to give fine haptic feedback. If you made the motor smaller, it changed the vibration characteristics, even if it was just a little bit.
Technicians started with board-level work, using laser-assisted rework and microscopic soldering. They bridged logic to ensure the new SIM tray connected with the phone's cellular system.
After rebooting, the modified device recognized a physical SIM card. If you wanted to hot-swap, you needed to restart to get it detected.
Warranty, water resistance, and long-term risk
Opening the chassis and milling the frame voided Apple's warranty, and factory water resistance was lost once the seals were broken. During travel, the modified iPhone developed a microphone failure because of a loose ribbon cable.
The iPhone had to be shipped back to Shenzhen for repair.
Huaqiangbei had a long history of iPhone modifications, particularly after U.S. models of iPhone 14 removed physical SIM trays. Skilled technicians there routinely performed microsoldering and component-level repairs beyond Apple's authorized service network.
Mass-produced consumer electronics operated under different constraints. Apple designed for regulatory compliance, long-term durability, thermal stability, and consistent user experience across millions of units.
The transparent iPhone Air with a working SIM slot proved that determined technicians could reshape Apple hardware. It also illustrated why Apple balanced aesthetics, thermals, haptics, and structural integrity the way it did.
