Samsung Galaxy S21 Plus Main Flex

Main Flex for Samsung Galaxy S21 Plus: Board Interconnection

The main flex for Samsung Galaxy S21 Plus re-establishes the vital communication between the main board and the secondary charging board of the mobile phone. This interconnection flex cable ensures correct data traffic, charging, and internal signal transmission in the device.

Technical Specifications

• Part type: Main interconnection flex
• Compatibility: Samsung Galaxy S21 Plus (SM-G996B, SM-G996B/DS, SM-G996U, SM-G996U1, SM-G996W, SM-G996N, SM-G9960)
• Quality: Compatible

When to Replace

• The phone does not charge or charging fails intermittently — confirm the diagnosis
• The bottom microphone does not pick up sound during calls — confirm the diagnosis
• Lack of connection between the charging board and the motherboard after impact or disassembly
• Visible damage, deep creases, or tears in the conductive traces of the ribbon

Notes for the Technician

• Test before applying: connect the part to the equipment 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
• Access requires removing the glass back cover and the wireless charging coil
• Disconnect the battery before handling or plugging the FPC connectors into the boards
• Check the correct alignment of the terminals before applying plugging pressure

What Distinguishes This Version

This compatible part has been selected to ensure a precise fit in the smartphone's chassis connectors. It is an economical and reliable solution, designed specifically for professional workshop repairs.

Frequently Asked Questions

Does this flex cable fit the standard Samsung Galaxy S21 or S21 Ultra?
No, this component has specific dimensions and layout for the Samsung Galaxy S21 Plus (SM-G996B) chassis, and is not interchangeable with other sizes in the range.

Does replacing this flex solve charging issues?
If the fault originates from an interruption in current delivery between the bottom board and the main board, yes; if the damage is in the USB-C port or the battery, replacing only this flex will not solve the problem — confirm the diagnosis.