The phone cannot be detected by other devices using Bluetooth wireless technology

You have not turned the Bluetooth function on.

Make sure that the visibility is set to

show phone. See To receive an item

on page 50.

I cannot synchronize or transfer data between my phone and my computer, when using the USB cable.

The cable or software that came with your phone has not been properly installed. Go to

www.sonyericsson.com/support to

read Getting started guides which contain detailed installation instructions and troubleshooting guides.

Error messages

Insert SIM

There is no SIM card in your phone or you may have inserted it incorrectly.

See Charging the battery on page 7.

The SIM card connectors need cleaning. If the card is damaged, contact your network operator.

Insert correct SIM card

Your phone is set to work only with certain SIM cards. Check if you are using the correct operator SIM card.

Wrong PIN/Wrong PIN2

You have entered your PIN or PIN2 incorrectly.

Enter the correct PIN or PIN2 and select Yes. See To insert the SIM card on page 5.

PIN blocked/PIN2 blocked

You have entered your PIN or PIN2 code incorrectly three times in a row.

To unblock, see SIM card lock on page 62.

Codes do not match

Codes that you have entered do not match. When you want to change a security code, for example your PIN, you have to confirm the new code.

See SIM card lock on page 62.

No netw. coverage

Your phone is in flight mode. See Flight mode on page 6.

Troubleshooting 65

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Sony Ericsson Z750i manual Error messages