Huawei M635 User Guide - Page 34
Troubleshooting - problems
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12 Troubleshooting If you encounter any problem when using your phone, try to rectify the problem according to the following table. If the problem persists, contact the service provider or the dealer. The battery cannot The charger is properly connected to your be charged. phone and the power socket. The phone cannot be powered on. • • The battery power is sufficient. The battery is properly installed. • Press and hold End key. You cannot make a call except an emergency call. • The phone number is correct. • You are in the network service area. • You have not enabled the call restriction function. Bad call quality. • The signal strength is strong enough. • If you are staying indoors, move close to a window. During a call, the • The microphone is not covered. other side cannot • If you use a wired headset, make sure hear your voice. connector is fully plugged in. 32