A Four-Sided Curved Display Like No Other

The centerpiece of iPhone 20's redesign is the display. Unlike the "waterfall" curves found on some Android phones, Apple's approach is described as "emphasizing visual depth rather than extreme curvature" [citation:3][citation:8]. The glass will curve subtly on all four edges, while maintaining a flat surface for interaction — balancing aesthetics with usability.

Key display technologies:

• Samsung custom OLED panel: "Isometric four-curved surface" design, not the aggressive edge found on other phones [citation:3]
• COE (Color Filter on Encapsulation): Removes the polarizer layer, potentially increasing light transmission by ~33%, reducing power consumption by 25%, and enabling thinner construction [citation:3]
• Ultra-scratch-resistant display: Next-generation Ceramic Shield with improved durability [citation:1][citation:5]
• Bezel reduction: Internal schematics suggest frames as thin as 1.1mm — approaching the physical limit [citation:3]

From Moving Parts to Haptic Feedback

The transition to solid-state buttons is perhaps the most certain of all rumored features. Apple originally planned to introduce this technology on the iPhone 15 Pro in 2023 under "Project Bongo," but canceled it due to technical challenges [citation:5][citation:8]. Since then, the feature has been repeatedly delayed.

According to Instant Digital, the solid-state button system has now passed functional testing, including use while wearing gloves, with wet hands, in extreme temperatures, and when the phone has a case on [citation:5]. An ultra-low-power microprocessor would allow the buttons to remain functional even when the phone is powered off or the battery is depleted [citation:3][citation:5].

Face ID, Camera, and Speaker — All Invisible

The most technically ambitious aspect of iPhone 20 is moving all front-facing sensors completely under the display. The Dynamic Island — introduced with iPhone 14 Pro in 2022 — would finally disappear after five years [citation:3].

Technical challenges:

• Under-display Face ID: Requires infrared sensors to function through the OLED panel without image distortion. Some sources suggest this is achievable by 2027, using advanced UDIR (Under-Display Infrared) technology [citation:3].
• Under-display camera: More difficult than Face ID. The camera must capture enough light through the display for quality selfies. Some analysts suggest the camera may be the last sensor to be fully hidden, with a small transparent area or pixel gap reserved for it.
• Under-display speaker: Replaces the earpiece slit with actuators that vibrate the display glass to produce sound. This eliminates one of the last remaining visible openings on the phone's front [citation:3][citation:5].

A Historic Capacity for iPhone

The rumored 6,000 mAh battery would be the largest ever in an iPhone — by a significant margin. For comparison, the iPhone 17 Pro Max features approximately 4,700 mAh. This represents a roughly 28 percent increase in capacity [citation:1][citation:3].

How Apple might achieve this:

• Silicon anode technology: Silicon can store up to 10 times more lithium ions than traditional graphite anodes. The challenge has always been managing expansion during charging cycles, which causes degradation. Apple reportedly has found a solution for mass production [citation:3].
• Space savings from other components: Eliminating physical buttons and moving sensors under the display frees internal volume for a larger battery.
• Display efficiency gains: COE technology and dual-layer OLED panels reduce power consumption [citation:3][citation:5].

A 6,000 mAh battery, combined with power-efficient components and the A21 chip (second-generation 2nm), could potentially deliver two full days of normal use — an unprecedented achievement for an iPhone [citation:3].

From Smartphone to Cinema Camera

One of the most technically impressive rumored features is the camera system. Apple is reportedly adopting LOFIC (Lateral Overflow Integration Capacitor) technology for the iPhone 20 [citation:3].

What LOFIC does: Each pixel has an "overflow pool" that captures excess light before it saturates the main photodiode. This prevents the highlights from blowing out in high-contrast scenes [citation:3].

The result: Approximately 20 stops of dynamic range.

• iPhone 17 Pro: ~12-13 stops [citation:3]
• Professional ARRI Alexa cinema camera: ~14-15 stops [citation:3]
• iPhone 20 (rumored): ~20 stops — exceeding professional cinema cameras

This would represent a fundamental shift in computational photography. Instead of relying on multi-frame HDR stacking (which can create artifacts in moving scenes), single-frame wide dynamic range capture would become possible. Motion blur artifacts in photos of moving subjects could be dramatically reduced [citation:3].