Snapdragon 4 Gen 6 (SM4875) Leak: A Detailed Spec-by-Spec Breakdown

Manufacturing Process: Staying on TSMC 4nm

The SM4875 continues with the same TSMC 4nm process used for the Snapdragon 4 Gen 5 . This is a proven node that balances power efficiency with cost — important for the budget segment.

GPU: The Biggest Upgrade

The most significant change is the move from an Adreno 4-series GPU to an Adreno 6-series GPU . NotebookCheck states this promises "another significant performance leap" over the 4 Gen 5's already large generational gain . For budget phones, this could mean dramatically better gaming and graphics performance.

Memory: LPDDR5 Arrives, LPDDR4X Stays

• Dual-channel LPDDR5 at 3,200 MHz is now supported — a new addition .
• LPDDR4X remains supported as a lower-cost OEM option for cheaper device builds .

This flexibility lets phone makers choose between higher memory bandwidth (for performance) or lower cost, depending on the target price point.

Connectivity & PCIe: Wi-Fi 6, Bluetooth 6.0, but No Wi-Fi 7

A new single-lane PCIe Gen 3 interface is added, but it's not for storage or general expansion. Instead, it's used specifically to connect newer WLAN companion chips .

• WCN6450 offers Wi-Fi 6 (1×1) + Bluetooth 6.0 over the PCIe Gen 3 lane .
• WCN6750 offers Wi-Fi 6 (2×2) + Bluetooth 5.2 over PCIe Gen 3 .
• Two legacy options (WCN3998-2 and WCN3988) connect over SLIMbus instead, supporting only Wi-Fi 5 and Bluetooth 5.x .
• Wi-Fi 7 is not supported by any of the four companion chip options listed in the data sheet .

Package Size: Bigger Chip, More I/O

The SM4875 uses a PSP917 package, measuring 11.1 × 12.0 mm . This is larger than the Snapdragon 4 Gen 5's PSP808 package, reflecting added I/O for PCIe and a higher GPIO count .

Security Hardware

• Hardware-based ECC image authentication .
• Widevine L1 support for HD streaming .
• Updated Trust Management Engine for root-of-trust functions .

Launch Window

NotebookCheck states that the SM4875 points to a possible 2027 launch for commercial devices using the chip . That could mean budget phones arriving well after the chip's initial documentation.

Key Caveat: A Leak, Not an Official Announcement

All of these details come from a leaked internal document (dated March 2026) rather than an official Qualcomm announcement. NotebookCheck explicitly notes that final specifications may change before the product reaches the market . No other independent source has confirmed the document's contents.

What This Means for Budget Phones

The Snapdragon 4 Gen 6 appears to be a focused upgrade: no CPU changes, but meaningful improvements in GPU, memory bandwidth, and connectivity. For buyers of affordable Android phones in 2027, the biggest real-world difference will likely come from the Adreno 6-series GPU and the availability of LPDDR5 memory — both of which could significantly improve gaming and multitasking in the sub-$200 segment.