Alcatel OT-710A User Guide - Page 45

23 Troubleshooting Before contacting the aftersales department, you are advised to follow the instructions below: • You are advised to switch off the telephone from time to time to optimise its performance. • You are advised to fully charge ( ) the battery for optimal operation. • Avoid storing large amounts of data in your telephone as this may affect the performance of your telephone. and carry out the following checks: My mobile phone will not switch on • Press until the screen comes on • Check the battery charge level • Check the battery contacts, remove and reinstall your battery, then turn your telephone back on My phone has not responded for several minutes • Press the key • Remove the battery and re-insert it, then switch the phone back on My screen is difficult to read • Clean your screen • Use your mobile phone in accordance with the recommended conditions of use My mobile phone turns off by itself • Check that your keypad is locked when you are not using your mobile phone • Check the battery charge level My mobile phone will not charge properly • Make sure that your battery is not completely discharged; the battery charge indicator can take several minutes and may be accompanied by a quiet whistling sound • Make sure charging is carried out under normal conditions (0°C +40°C) • Make sure your battery is inserted. It must be inserted before plugging in the charger 87 • Make sure you are using an Alcatel battery and charger in the box • When abroad, check that the electrical current is compatible My mobile phone will not connect to a network • Try connecting in another location • Verify the network coverage with your operator • Check with your operator that your SIM card is valid • Try selecting the available network(s) manually (see page 79) • Try connecting at a later time if the network is overloaded SIM card error • Make sure the SIM card has been correctly inserted (see page 13) • Verify with your operator that your SIM card is 3V or 1.8V compatible; the old 5V SIM cards cannot be used • Make sure the chip on your SIM card is not damaged or scratched Unable to make outgoing calls • Make sure you have dialled a valid number and press the key • For international calls, check the country and area codes • Make sure your mobile phone is connected to a network, and that the network is not overloaded or unavailable • Check your subscription status with your operator (credit, SIM card valid, etc.) • Make sure you have not barred outgoing calls (see page 43) Unable to receive incoming calls • Make sure your mobile phone is switched on and connected to a network (check for overloaded or unavailable network) • Check your subscription status with your operator (credit, SIM card valid, etc.) • Make sure you have not forwarded incoming calls (see page 43) • Make sure that you have not barred certain calls The caller's name does not appear when a call is received • Check that you have subscribed to this service with your operator • Your caller has concealed his/her number The sound quality of the calls is not optimal • You can adjust the volume during a call by means of the Volume key • Check the network strength 88