AMAOE G998U-012 Stencil For Samsung S21 Ultra

The AMAOE G998U stencil is a professional middle layer motherboard reballing stencil designed for the Samsung Galaxy S21 Ultra (SM-G998U series). It is mainly used in sandwich motherboard repair, where technicians restore inter-layer connections between stacked PCBs.

This stencil is widely used in advanced GSM repair labs for Snapdragon S21 Ultra boards.

🔧 Main Purpose

• Middle layer motherboard reballing
• Inter-board signal restoration (sandwich PCB)
• Solder paste application on fine-pitch pads
• Repair of no power / boot loop / signal failure issues
• Advanced S21 Ultra motherboard reconstruction

⚙️ Features

• 0.12mm ultra-thin stainless steel
• Precision laser-cut apertures
• High heat resistance for rework stations
• Reusable and durable design
• Accurate alignment for microscopic PCB pads

📱 Compatible Device

• Samsung Galaxy S21 Ultra
• Models: SM-G998U / G998W / G998B / G998D variants

🧠 Supported Board Areas

• Middle layer interconnect pads
• CPU / PMIC communication lines
• RF signal routing layers
• Sandwich motherboard vias & bridges

🧩 Applications

• Samsung flagship motherboard repair
• Dead boot repair (no power issues)
• Network / signal fault repair
• Advanced BGA rework in GSM labs
• Inter-layer PCB restoration

⚠️ Important Note

This stencil is not a simple CPU reballing tool. It is specifically designed for middle layer (sandwich board) repair, which is one of the most advanced motherboard-level operations in mobile repair.

🔥 Summary

The AMAOE G998U-012 stencil is essential for technicians working on S21 Ultra stacked motherboard failures, especially when standard CPU or IC reballing cannot fix the issue.