When signal strength is poor, mobile devices constantly boost their transmission power in an attempt to maintain a stable connection. This results in dropped calls/data and rapid battery drain. Since a repeater was installed, misalignment or misconfiguration could be degrading the signal strength.
* A. WPS applies to Wi-Fi, not cellular repeaters.
* C. Channel frequency might matter for interference, but signal strength is the most direct cause of the described symptoms.
* D. Power budget applies to PoE and wired devices, not mobile phones.
References (CompTIA Network+ N10-009):
* Domain: Network Troubleshooting - Wireless/cellular troubleshooting, signal strength impact, user symptoms (battery drain, poor connectivity).