OEM-Spec Antenna Flex Cable for Samsung Galaxy S21 FE (Mainboard to Charging Port)
Restore full signal strength and charging functionality to your Samsung Galaxy S21 FE with this genuine-style antenna connecting cable. This critical component bridges your phone’s mainboard and charging port board, ensuring optimal 5G/WiFi/GPS/BT performance while maintaining fast charging capabilities.
Key Features:
✅ Multi-Antenna Support – Carries cellular (5G/LTE), WiFi 6, Bluetooth 5.2, and GPS signals
✅ Charging Data Lines – Maintains 25W fast charging functionality
✅ Precision Connectors – Gold-plated contacts for maximum conductivity
✅ Flexible PCB Design – Reinforced stress points prevent cracking
✅ Model-Specific Fit – Designed exclusively for SM-G990U/B/W models
Why Replace This Cable?
- Weak signal reception? Fix dropped calls and slow data speeds
- Charging issues? Restore fast charging functionality
- Visible cable damage? Prevent complete signal loss
- Water damage repair? Essential for full device restoration
Compatibility:
✔ Samsung Galaxy S21 FE 5G (SM-G990U, SM-G990B, SM-G990W – All Variants)
✔ Not compatible with standard S21/S21+/Ultra models
Professional Installation Guide:
- Power off device and disconnect battery
- Remove charging port board (requires T3 Torx screwdriver)
- Transfer cable carefully – Note original routing path
- Secure all connectors before reassembly
Warning: Requires intermediate technical skills – not recommended for first-time DIYers
The Nervous System of Your Phone
This unassuming cable handles:
✔ Cellular signals (5G/LTE)
✔ Wireless communications (WiFi 6/Bluetooth 5.2)
✔ Location services (GPS/Galileo/GLONASS)
✔ Charging data (USB PD communication)
Symptoms of Failure:
- Fluctuating signal bars
- Slow charging/intermittent charging
- “No SIM” errors despite good SIM tray
- Weak WiFi/BT range
Professional Repair Insights:
- Inspect routing – Must follow exact OEM path to avoid interference
- Test before reassembly – Check both signal and charging
- Use ESD-safe tools – Prevent static damage to connectors
Cost-Benefit: 15cablereplacementvs15cablereplacementvs150+ motherboard repair if left unresolved
