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Try connecting at a later time if the network is overloaded.
My phone cannot connect to the Internet
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Check that the IMEI number (press *#06#) is the same as the one printed on your warranty card or box.
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Make sure that the internet access service of your SIM card is available.
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Check your phone's Internet connecting settings.
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Make sure you are in a place with network coverage.
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Try connecting at a later time or another location.
Invalid SIM card
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Make sure the SIM card has been correctly inserted (see "Inserting or removing the Nano SIM card and microSD").
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Make sure the chip on your SIM card is not damaged or scratched.
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Make sure the service of your SIM card is available.
Unable to make outgoing calls
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Make sure you have dialed a valid number and have pressed the Call Key
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For international calls, check the country and area codes.
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Make sure your phone is connected to a network, and the network is not overloaded or unavailable.
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Check your subscription status with your service provider (credit, SIM card valid, etc.).
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Make sure you have not barred outgoing calls.
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Make sure that your phone is not in airplane mode.
Unable to receive incoming calls
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Make sure your phone is switched on and connected to a network (check for overloaded or unavailable network).
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Check your subscription status with your service provider (credit, SIM card valid, etc.).
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Make sure you have not forwarded incoming calls.
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Make sure that you have not barred certain calls.
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Make sure that your phone is not in airplane mode.
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