Power Button Samsung Galaxy S21 S21 Plus

Power Button for Galaxy S21 and Galaxy S21 Plus: Precise Tactile Response

The Power button for Samsung Galaxy S21 and Galaxy S21 Plus restores the correct mechanical actuation of the mobile phone when turning on, turning off or locking the screen. This original Samsung part comes from device disassembly and ensures a perfect fit on the side of the chassis. It replaces the worn on/off switch or one lacking tactile click.

Technical Specifications

• Part type: Side Power button
• Compatibility: Samsung Galaxy S21 (SM-G991B, SM-G991B/DS, SM-G991U, SM-G991U1, SM-G991W, SM-G991N, SM-G9910); Samsung Galaxy S21 Plus (SM-G996B, SM-G996B/DS, SM-G996U, SM-G996U1, SM-G996W, SM-G996N, SM-G9960)
• Part code: GH59-15378A
• Quality: Original — Pulled

When to Replace

• The power button does not click or gets stuck in the frame
• The phone does not turn on via external pressure on the button — confirm the diagnosis
• The screen locks by itself due to a stuck contact
• External part damaged or lost after opening the device

Notes for the Technician

• Test before applying: connect the part to the device and confirm its operation before fixing or gluing it permanently. Thus, if there is any problem, the return or warranty is handled quickly and simply.
• Difficulty: Medium; requires opening the back cover with moderate heat application
• Always disconnect the battery before handling the interior components near the chassis
• Check that the electrical contact on the internal flex is functional before closing the cover
• Back cover fixing adhesive sold separately

What Distinguishes This Version

This is a component removed from brand equipment, maintaining factory tolerances and the exact click crown. It is the appropriate choice for technicians seeking a perfect finish and millimeter alignment in repair.

Frequently Asked Questions

Does this button work interchangeably on the Galaxy S21 and Galaxy S21 Plus?
Yes, the component with reference GH59-15378A is fully shared and compatible with both models in the range.

Does the part include the interior flex with the electrical switch?
This is the exterior physical button with contact mechanism according to reference GH59-15378A, without including additional flex cables or adhesives.